Put some small washers between the clutch shoes and your flywheel will let the shoes move a little freeer as they wont be right on the flywheel. This will use up a little space and make sure you use a pretty tough washer on the end right next to your screw. You also want just a little bell movement.
Iv'e got an OS 30, barely broken in and really like it. Starts easy and easy to tune. Like I said barely broke in and its starting to make some power. Just my .02
Cool, Ive' got the ext. front and rear. Think Iv'e got everything rounded up to do the mid tank just gotta get started. I do think the longer tvps make the truck handle better. Again nice build.