Looks pretty good to me.
The only feedback I would interject is that the rules seem biased for Beetle upgrades. For instance a lot of high point changes cannot (or are not regular) be done on busses.
For instance aluminum 944 rear control arms, a bus is generally too narrow unless the fenders are flared, which in my book is not cool.
Narrowed front beam, not needed on a bus for big brakes.
I am blathering a bit here, but you get the point. Not trying to be a nudge, but hopefully showing a little different perspective from a bus guy.
As for the engines and drivetrain that all looks good.
Thanks,