Safariland 6390RDS fitment issues with SIG P320 w/ X300U


So I ordered a Safariland 6390RDS-4502-731 for a SIG P320 that I'm running with an MRDO and a Surefire X300U-A (for perfectly in spec with what the holster is intended for). Now, unlike my other Safariland 639X series holsters, this one has a very exaggerated inward bending portion on the left side, at approximately the positon between where the grip module and the light would be if inserted directly. And damn it, for every 5 draws and reholsters, I get the X300U-A caught up on that protuberance that definitely makes the optimal reholstering aperture very small.

Can this be heated and bent slightly back or shaved/sanded down without ill effect? Is this structurally essential to the holster or the retention? Does this serve any necessary function that modification of it would hinder?