double shimming the pockets and tripple shimming the pockets? for that matter, what does it mean to shim the pockets? i have been around mark gregory alot and talked to him about sub extending rails to tighten pockets. but i have always heard about people double and tripple shimming pockets to make them tighter. i just bought a table and need to have it set up in the next few weeks and would like to tighten the pockets. i don't have the cash (and the table is not what i would consider worthy of having the rails done) to have the sub rails extended but would still like to tighten the pockets. what can be done? i have tried to read threads in this section about facings and shims, but i am just to uneducated about table mechanics to understand the possible and the plauseable. any help would be appreciated.