Goneglocken

Guys, I'm in the process of converting an older two sided CMore mount (frame hole space issues not wanting to weld frame) to a Leupold DPP. I already have the two mounting screws drilled and tapped. Question is, do I need a couple of blind pins or dead hole set screws in 2 of the 4 locator holes to maintain zero, or will the two mounting screws be sufficient? Thanks, Jeff