Ok, this should apply to all KHE Clone coasters, as well as Odyssey and other "butterfly spring" coasters (though they may have different room in the hubshell. However, if you have an externally adjustable hub, you will just have to measure by backpedalling 1 revolution to 0* (or 90, whatever works for you), then pedaling forward and guestimating. Note: You cannot get 90* slack on these hubs, even with a relatively low 2.5 gearing and min spacers!
Driver/clutch thread pitch: 15mm per rotation (23mm/1.53 total)
KHE Spacer thickness: 1mm
Tophat Spacer: 5/7.5mm depending on orientation.
X= Total spacer stack (i.e. tophat set regular 7.5mm + 1mm spacer = 8.5)
G= Gear Ratio or Chainwheel (sprocket) size / Driver size (i.e. 25/9= 2.78)
( 12.7 - X ) / 15 * 360 / G = Degrees slack at pedals*
*assuming good chain tension, etc.
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