According to spec, track tension should be measured 16" ahead of the rear idler shaft and having a ten pound weight pulling the track down.
Edge suspension measurement spec should be 3/8 - 1/2".
M-10 suspension measurement spec should be 7/8 - 1 1/8".
I know for an Edge suspension it can be run as loose as possible without ratcheting.....not sure if the same is true for an M-10.