Moped Army

I have an A35 running well (hitting 40 with just a Tecno Circuit) and an A3, which I presume would be running well if I replaced the crank seal.

So, I have a Jcams intake with 20mm Mikuni carb coming. I have the Circuit, and I'm looking at getting a Alukit (perhaps Airsal, but leaning toward Alukit).

I've heard the A3 has a better clutch, and if you get the necessary pin to throw a kit on it, better performance can be had? MAYBE!?

You tell me. I'm sure you guys know this far better than I. Should I build the A3 or the A35 up?

And, for those who vote for the A3 build, where might one pick up the necessary wrist pin to convert it?

All advice is appreciated (most of it, anyway).