I must admit, I beleive the AE lads are making progress. I watched a video of the latest mod national here the other day, and Craig Drescher running the TC4 (with ITF kit i beleive) just romped away at the start, I was quite amazed at just how much speed he had, and the nice thing is he did this from the latest generation of belt based cars (Teemu's Mi2EC and Chris Graingers BD), which says alot.
I can't talk to loudly as I know I changed from the TC4 to a 415, but seeing the preformance Craig got for the TC4, I'm definately tempted to try it again.
Keep up the good work,
Cheers
Dan Chambers