diff --git a/build-plans.toml b/build-plans.toml
index 089cea54f..d08a79f6c 100644
--- a/build-plans.toml
+++ b/build-plans.toml
@@ -454,10 +454,10 @@ inherits = "ss14"
 [buildPlans.iosevka-aile]
 family  = "Iosevka Aile"
 desc = "Sans-serif"
+spacing = "quasi-proportional"
 no-cv-ss = true
 no-ligation = true
 snapshotFamily = 'iosevka-aile'
-quasiProportionalDiversity = 2
 
 [buildPlans.iosevka-aile.variants.design]
 at = 'fourfold'
@@ -512,11 +512,11 @@ css   = "normal"
 [buildPlans.iosevka-etoile]
 family  = "Iosevka Etoile"
 desc = "Slab-serif"
+spacing = "quasi-proportional"
 serifs = 'slab'
 no-cv-ss = true
 no-ligation = true
 snapshotFamily = 'iosevka-etoile'
-quasiProportionalDiversity = 1
 
 [buildPlans.iosevka-etoile.variants.design]
 at = 'fourfold'
@@ -537,10 +537,10 @@ css   = "normal"
 [buildPlans.iosevka-sparkle]
 family  = "Iosevka Sparkle"
 desc = "Hybrid, like iA Writer’s Duo"
+spacing = "quasi-proportional"
 no-cv-ss = true
 no-ligation = true
 snapshotFamily = 'iosevka-sparkle'
-quasiProportionalDiversity = 1
 
 [buildPlans.iosevka-sparkle.variants.design]
 at = 'fourfold'
diff --git a/font-src/glyphs/auto-build/transformed.ptl b/font-src/glyphs/auto-build/transformed.ptl
index ab5048984..d3adafca5 100644
--- a/font-src/glyphs/auto-build/transformed.ptl
+++ b/font-src/glyphs/auto-build/transformed.ptl
@@ -497,7 +497,7 @@ glyph-block Autobuild-Transformed-Mathematical : begin
 	define [tfSansItalic a]     : begin [tfSans a] [tfItalic a]
 	define [tfSansBoldItalic a] : begin [tfSans a] [tfBold a] [tfItalic a]
 	define [tfTypeWriter a] : begin
-		set a.shape.quasiProportionalDiversity 0
+		set a.shape.isQuasiProportional false
 		if (a.derivingVariants && a.derivingVariants.mathtt)
 			set a.variants a.derivingVariants.mathtt
 
@@ -581,7 +581,7 @@ glyph-block Autobuild-Transformed-Mathematical : begin
 	CreateMathAliasable SLAB 'mathsz' 'mathbi' tfSansBoldItalic 0x1D7AA LowerGreek
 
 	# Math Typewriter
-	local doTypewriter : para.quasiProportionalDiversity > 0
+	local doTypewriter : not para.isQuasiProportional
 	CreateMathAliasable doTypewriter 'mathtt' null tfTypeWriter 0x1D670 UpperLatin
 	CreateMathAliasable doTypewriter 'mathtt' null tfTypeWriter 0x1D68A LowerLatin
 	CreateMathAliasable doTypewriter 'mathtt' null tfTypeWriter 0x1D7F6 Digits
diff --git a/font-src/meta/aesthetics.ptl b/font-src/meta/aesthetics.ptl
index fa2025895..75eedacf8 100644
--- a/font-src/meta/aesthetics.ptl
+++ b/font-src/meta/aesthetics.ptl
@@ -122,7 +122,7 @@ export : define [calculateMetrics para] : begin
 	define OneBalance : fallback para.onebalance 0
 
 	# derived metrics
-	define WideWidth0 : if (para.quasiProportionalDiversity === 0) (Width * 2) UPM
+	define WideWidth0 : if para.isQuasiProportional (Width * 2) UPM
 	define WideWidth1 : if (para.spacing >= 1) WideWidth0 Width
 	define WideWidth2 : if (para.spacing >= 2) WideWidth0 Width
 
diff --git a/font-src/meta/naming.ptl b/font-src/meta/naming.ptl
index 4a5263b04..d1d7f0f3c 100644
--- a/font-src/meta/naming.ptl
+++ b/font-src/meta/naming.ptl
@@ -192,7 +192,7 @@ export : define [assignFontNames para metrics font] : begin
 	if (minorVersion > 99 || patchVersion > 9) : throw : new Error "Version number overflow"
 	set font.head.fontRevision : majorVersion + (minorVersion * 10 + patchVersion) / 1000
 
-	if (para.quasiProportionalDiversity === 0) : begin
+	if [not para.isQuasiProportional] : begin
 		set font.OS_2.panose.bProportion 9 # Monospaced
 		set font.post.isFixedPitch       true
 	: else : begin
diff --git a/font-src/support/parameters.js b/font-src/support/parameters.js
index adc0bd692..b6df1f913 100644
--- a/font-src/support/parameters.js
+++ b/font-src/support/parameters.js
@@ -11,8 +11,6 @@ function initPara(data, argv) {
 	apply(para, data, ["shapeWeight"], { shapeWeight: argv.shape.weight });
 	apply(para, data, ["shapeWidth"], { shapeWidth: argv.shape.width });
 	apply(para, data, [`s-${argv.shape.slope}`]);
-	apply(para, data, [`diversity-${argv.shape.quasiProportionalDiversity}`]);
-	para.quasiProportionalDiversity = argv.shape.quasiProportionalDiversity || 0;
 	if (argv.featureControl.noCvSs) para.enableCvSs = false;
 	if (argv.featureControl.noLigation) para.enableLigation = false;
 	return para;
diff --git a/params/parameters.toml b/params/parameters.toml
index fdad1a058..87e00510e 100644
--- a/params/parameters.toml
+++ b/params/parameters.toml
@@ -67,6 +67,12 @@ slab = 0
 # Old style number height
 onumZeroHeightRatio = 1.145
 
+# Reset diversity
+diversityM  = 1
+diversityF  = 1
+diversityI  = 1
+diversityII = 1
+
 [verbose]
 verbose = true
 
@@ -90,6 +96,15 @@ spacing = 0
 enableLigation = false
 forceMonospace = true
 
+# Quasi-proportional
+[spacing-quasi-proportional]
+spacing = 3
+isQuasiProportional = true
+diversityM  = 1.25
+diversityF  = 0.75
+diversityI  = 0.75
+diversityII = 0.50
+
 ###### Slopes
 [s-italic]
 isItalic = true
@@ -98,23 +113,3 @@ slopeAngle = 9.4
 [s-oblique]
 isOblique = true
 slopeAngle = 9.4
-
-###### Diversity
-[diversity-0]
-diversityM = 1
-diversityF = 1
-diversityI = 1
-diversityII = 1
-
-[diversity-1]
-diversityM = 1.25
-diversityF = 1.00
-diversityI = 0.75
-diversityII = 0.75
-
-[diversity-2]
-diversityM = 1.25
-diversityF = 0.75
-diversityI = 0.75
-diversityII = 0.5
-
diff --git a/verdafile.js b/verdafile.js
index 49adfb96b..ee27f2096 100644
--- a/verdafile.js
+++ b/verdafile.js
@@ -158,8 +158,7 @@ const FontInfoOf = computed.group("metadata:font-info-of", async (target, fileNa
 			spacing: bp.spacing || null,
 			weight: sfi.shapeWeight,
 			slope: sfi.slope,
-			width: sfi.shapeWidth,
-			quasiProportionalDiversity: bp["quasiProportionalDiversity"] || 0
+			width: sfi.shapeWidth
 		},
 		// Menu
 		menu: {
@@ -689,7 +688,7 @@ const ReleaseNotePackagesFile = file(`${BUILD}/release-packages.json`, async (t,
 		releaseNoteGroups[k] = {
 			subGroups,
 			slab: primePlan.serifs === "slab",
-			quasiProportional: primePlan.quasiProportionalDiversity > 0
+			quasiProportional: primePlan.spacing === "quasi-proportional"
 		};
 	}
 	await fs.promises.writeFile(out.full, JSON.stringify(releaseNoteGroups, null, "  "));