The biggest concern are the brakes, last year in the middle of the summer I overheated them despite the brake ducts. Under hard braking the weight transfer rear-front was massive. The front brakes couldn't handle it for more than 1-2 laps. That was the main reason I bought the ASTs, they should help keeping some weight on the rear, reduce nose-dive effect under hard braking. I have 310mm and Pagid RS19 rear brakes that were doing nothing, now they should also help.
I agree with Alex, that is the only working cooling system that you can buy. That's why my DSG cooling is inspired by SSP. They are using an oil pump to get the oil to the radiator, because they are connected to the DSG in the low pressure area directly to the oil pan. I believe they are the only ones doing it like this and it is the right way. Otherwise the hoses, radiator could fail under the massive pressure if they are connected to the top side. 99% that they are using a Mocal/Setrab 2.1 LPH oil pump and Setrab oil radiator because there are some unique marking on their pump that I've recognized.
What we did is to connect to the lower pressure oil pan (with the help of a very talented welder, the one who build my new wing mounts) and use the same Mocal oil pump as SSP with our own temperature switch and high quality hoses:
Normally it should work but it needs to pass the track test.