I have a build thread in the builds thread forum, where I posted an excel sheet with item descriptions, part numbers, and prices of every part that went into building my compound boost setup. The info for that flange is there. I don't remember what I bought. I remember having to modify the flange holes cause they didn't line up right but I made it work.

 

I ran the same turbo on my compound for a while. The boost response in the compound setup is in the spool thread. At my altitude, 186kpa is equivalent to ~14.7 psi.


https://www.miataturbo.net/diy-turbo...5/#post1380426

 

The turbo actually comes in with a restrictor built in. Pretty cool idea.
My T25 oil drain flange didn't fit, so I drilled out the holes. We'll see if it seals.