Mounts OAG inline with imaging camera, attaches with standard OAG mount hardware. The bracket itself just slides over the arca plate and can be secured with a screw. I also use the generic focuser mount to attach right to the OAG rail.

I was going to add the .STEP,  but i'm currently having issues with my CATIA so I can't convert the .catpart and printables doesn't let me upload that format. If you do want the .Catpart let me know, otherwise i'll upload the .STEP eventually.