Doesn’t fit snug - Vector Optics Sphinx Red Dot Sight Pistol Mount Base for Springfield XD

I tried using this on my Springfield XD 40 cal and it just doesn’t fit snug. There is a lot of wiggle even after pretty much stripping the screws (by tightening so hard) between the plate and the piece that goes where the dove tail sight was. Then if you try to firm it up by having longer screws on the dot sight mount, it angles the plate up. A waste of $20, bc I can’t return bc of wearing out the screws.