would not spend that kind of money on a stock flange turbo, even if it is garrett. If staying stock flange id highly recommend just sticking with bnr or corksport
as for op, i wouldnt even consider an S2 tbh, just grab a Chris Ward k04 if you wanna replace it. either go s3 or cst4. cst4 is good...
The gaskets could be reused if they’re still in good condition. Worst case it leaks and you unbolt the downpipe. Aftermarket that should take like 10-15 mins
A freak OTS+ is a base map + revision (sometimes he’ll give you more according to peer experiences)
so you’ll have the basemap ready to...
xs power is the only cheapo manifold I’d go with. I’ve had some people run them for years and some people end up with leaks.
Graveyards is great if you don’t want EWG. If you want EWG and stock flange, don’t get it cause getting to the bolts is impossible.