I hear you about the filter. Mine is brand new as of a few weeks ago. I'm going to get the bottle neck fix with a nice external type filter that is easy to check and change. Eventually, the tank will be shiny like new. 
Ok. I'm on my second tank of 50/50 mix and things are going well. Using my gasoline calibrated AEM UEGO, I'm tuning for 11.0 AFR at 22psi. The experts say that for straight E85, a 10.4 AFR is what you should shoot for at high boost to be really safe. High boost is somewhat subjective, but I'm assuming that I'm getting to the high end. Since I'm 50/50 E85/91 I should be really safe being about half way between 11.5 and 10.4. I'm only going to 22 psi for now until my scangauge comes in and I can monitor knock. Should be just a couple more days. The butt dyno says the car is about as fast as the Camaro was on 5 psi with the STS GT67. It definitely is the fastest it has ever been while being much more driveable than the maxxed out stock turbo (thanks to the SST and mani).
It's easy to get a 50/50 mix at the pump. I just do gas first and match it with E85. If I ever goof up and am full before I get the matching amount of E85, I'll be erring on the rich side and will be safe. If I ever want to go on a long trip, I can turn down the boost and lower the fuel pressure to use normal gas if E85 is not available. Once I get a real tune (SCT) this method will still work.
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2003 SRT-4 Silver, Stg 1, Profec II Spec B, Bwoody mm and tm, PTP WGA, ED Super Beast, AGP SRI, PTP CV, Walbro 255, AGP return line, PTP 55mm TB, AEM UEGO, NW DP w/cutout, Maddog STS, PTP stg 3 clutch, Illumina+Eibach prokit, 225/45r17s on Enkei EVO5's, BFG DR's for track, PTP SST v2, ported exmani, 3" O2 housing, DW 750s, DCR oil mod - SCT tune by AGP on E85!!!
2002 Camaro SS M6, STS T67 Turbo kit, waiting for motor now.
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