I recall kouba having suggestions for sag settings? Last I tried their site, it was 'under construction' and n/a....so can't check it now.
Does seem is was different than your 'normal' 100mm starting point.
No matter what anyone would 'suggest' as clicker settings, you'd need to change them to suit you, anyway.
You refer to 'rebound' so assume you are talking about the shock? (no rebound on the forks..unless you spent a considerable sum getting it done ;) )
Numerous write ups on that on the web. References to packing, kicking, and (front) cutting and washing.....all those teknical terms.
In any case, the clickers need to be set by the rider for the rider.....not someone that gives you a click# over the web.
...sez me......
BTW...@135-140#, although the koubas will soften the shock spring somewhat (better leverage due to longer levers)..you may well do much better with a 4.6. Something different from the 5.0kg/mm stocker anyway.
Cheers!