lower compression is a must have. Get the right sort of pistons to do it and you don't have big issues.

I'm not really going to bag the twin turbo setup but heres my 2c...

The twin setup can cause issues with boost control and it's very likely to be a problem.

Twin turbo's are tricky to setup. They can have surge and other issues if they aren't selected very accurately. At a guess I would say the ones on this motor are a lucky dip guestimate more than a calculated selection, as such you have a big work around issue. Things like a bit more capacity and a cam can improve things or make them worse depending on the problems. You may require things like a balance pipe also to make it work.A twin setup is really aimed at getting the package to have a big spread of power, not a waste of time in anyones books but, quite a challenge when your the first to give it a shot.

Ultimately you need to be prepared to play with changing around front and rear housing sizes and wheel trims etc. to bring out the true benifits over a well selected single if there is any.

This is all accademic if wearing a 'twin turbo' badge is all your after however.