num_arms = selsz(3,3,4);
+channelslop=selsz(slop,slop,slop);
+
exteffrad = 70;
hubeffrad = selsz(30, 82, 40);
hubbigrad = selsz(20, 38, 38);
include <filamentteeth.scad>
include <axlepin.scad>
-channelwidth = prongthick + slop;
+channelwidth = prongthick + channelslop;
channeldepth = prongwidth + ratchettoothheight;
totalwidth = armendwallthick*2 + channelwidth;
totalheight = channeldepth + armendbasethick;