I did go with 20 weight but it doesnt' seem to make any difference on rebound dampening really. I went with the stock oil height, or slightly above stock anyways. I use it more for a dirtracker and smaller jumps rather than motocrossing.
yup, bbr is getting all of my bike allowance lately. i too installed front and rear springs on my ttr125le a few weeks ago (didn't mess with the fork oil yet). still can't ride the bike (it's cold outside, and there is a bit too much snow on the ground (canada eh?)). that and i have the engine currently in pieces while i install the bbr big bore kit (since i have the engine out, i plan to remove and lighten the flywheel too). i still have to shorten the chain (going to see if i can run a 14/49 gearing), and i have a braided brake line coming in a month and a bit. way too much fun.