Funny enough I just bought a synchrometer and can whole heartedly agree with it's use....makes things much easier than guessing.
And where did I get the info I needed to know I needed a synchrometer? Right here
Sorry S-man that you're not happy with the good-willed information you've solicited from the board, but disrespecting people that generously offer what is in some cases expensive help (at a shop) for free will not endear you to the majority of the board. A smarter response to the board would have included a constructive account of how you came to correct your MFI problems and a list of stages you proceded through to fix your problem would have been of far more help to the general board community. You would have scored yourself some kudos.
Glad your car is running well now.
Cheers