First of all just wanted to say hello to everyone since this is my first post here. 

Although the self tuning you guys are doing is far above my skill set, I figured this would be the best place to ask this question.

I currently have an EPL 93 octane tune on my stg 3 (K04) B5 S4 running 21-22 psi which yeilded ~365whp. I really like the tune but I'm moving to California in January and will need something I can run 91 on.  Would pulling 2-3 degrees of timing with lemmiwinks be sufficient?  Reason being I don't know that I'll have time to bring my car to EPL, I'll save some money, and I can add the timing back if I find better fuel.

Thanks in advance!

Personally, I would talk with EPL, and get the file adjusted if necessary. I am not a fan of lemmi-tweaks. Pulling a few degrees with lemmi will affect timing in all conditions, all the time, no matter what.

Honestly, the tune does not sound very aggressive, so you may be ok as is. You won't find better gas out here short of race gas. Try putting 91 in now and get some logs.