peter are u sure it bolts up to the stock av10 cases, i'm pretty sure bret told me it did not, but i don't know personally.
if it does i'd definatly use it over the polini stuff, polini is just poor quality, and the reeds are rivited on. i just opened mine up and one of my reeds was chipped on the end and i can't replace it without dremiling out the rivits and tapping the reed cage then installing screws....lame. or just buy a new shitty polini cage even shittyer
tom i have my motor completely apart right now if u want i may be able to test fit that intake setup and see if it will bolt on. Shoot me an e-mail if u want and i'll try and work it out since they are in SF, and then we will all know for sure.
also you should not have to match the cases, the tolerance is high and the hole is already almost as large as it could go (its big). the polini 4 pedal is actually a bit smaller than the hole but u can't make it match since the tolerance is too tight and dremiling it larger would get too close to the mounting hardware.
the 2 pedal performance reed setups are VERY fast and no hassle, and will work great with large 19mm+ intakes and carbs, bret is running a 2 pedal right now and he is still fast as shit. if you want to keep it simple its an option.