Booked!? Most places offer FREE inspections. Take it for a test drive. Shit take it tire kingdom if you have to. Your only getting a free inspection I don't see how they could fuck up something like that. Go out there with them and look it over yourself but make sure its ok first dont just walk in the shop. I know that use to piss me off all the time when I worked there.

A compression test is simple. Here is a link showing you step by step. You will need a compression tester of course.

http://www.c-speedracing.com/howto/c...t/comptest.php