Hay bud,
Got one of them a month or so ago. I highly recommend them.
Well built bit of kit. Made to order took about 2 weeks or so to build and deliver.
I think the m90 bolts straight up.
My setup will require a little bit of modification for top plate and bypass valve, when I ordered we discussed this. He was very helpful and supplied a cad file for the top plate so I can custom build.