I think I need to tighten up my chain, I did it once going by the directions in the manual but it seemed too tight so I backed off a little. Is it neccasary to compress the suspension like they say? Do you have to uncompress it to adjust then compress it again to check the tightness? Finally, how much slack to you actually leave? I tightened it so that in the middle the chain would only move 3/8" as the book says but that was too tight, is that measurement the slack it has if you pull the chain up/down as far as it will go? Please forgive the ignorance, this is the first chain drive machine I have had and I dont want to ruin it!