Added hex files, user guides and fingering charts.

hardware/pla-pkey-nurad.scad

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+w=8;        //key width, default 8
+wc=10;      //mounting end outer diameter, default 10
+l=15;       //key length (range normally increase in steps of 5)
+hght=3;     //key height, default 3,3.5 and 4
+angl=25;    //key end angle, default 25
+estp=1.5;    //end step before angle, default 0.5
+noext=0;    //set to 1 to get just the round part   
+
+// 20/3,26/3.5,32/4 sk: 15/3 (estp 1.5)
+
+ module prism(l, w, h){
+       polyhedron(
+               points=[[0,0,0], [l,0,0], [l,w,0], [0,w,0], [0,w,h], [l,w,h]],
+               faces=[[0,1,2,3],[5,4,3,2],[0,4,5,1],[0,3,4],[5,2,1]]
+               );
+   }    
+  
+difference(){
+    translate([0,0,0]) cylinder(h=hght,r=wc/2,,$fn=100);
+    translate([0,0,hght-2]) cylinder(h=2.2,r1=1.6,r2=3.2,$fn=100);
+    translate([0,0,-1]) cylinder(h=hght+5,r=1.6,$fn=100);
+    //translate([-8,-8,0]) cube([16,2,3]);
+    
+}
+if (!noext){
+difference(){
+    translate([-w/2,-l+1,0]) cube([w,l,hght]);
+    translate([0,0,hght-2]) cylinder(h=2.2,r1=1.6,r2=3.2,$fn=100);
+    translate([0,0,-1]) cylinder(h=hght+5,r=1.6,$fn=100); 
+    translate([w/2-1,-l,hght]) rotate([180,0,90]) prism(l,1,1);  
+    translate([-w/2-0.001,-l,hght-1]) rotate([90,0,90]) prism(l,1,1); 
+    //translate([-w/2,-l+5.5,hght]) rotate([160,0,0])prism(w,15,15);
+    translate([-w/2,-l,estp]) rotate([angl,0,0])cube(40,40,40);
+}
+}