Ive known spoolin since his Turbo Del Sol days, and mainstream has never been more than a facility that assists with HIS WORK. While i was with Mainstream we did stuff like Tuning, Roll Cage and turbo manifold fabrication. The engine, turbo kit, paint, chassis setup etc was all done by Spoolin.
Even if mainstream did ALL the work, who cares, they did all my work. Im too old to be getting dirty, id rather pay them to do it right than me do it.
As far as someone else making more power than spoolin, to date there isnt ANYONE i know of in ROME even CLOSE to him. If that changes, well let the dyno speak for itself