T-nuts dont fit - Vism VGF 250 Lumen LED Flashlight Vertical Grip

At first i thought i was doing something wrong when trying to install it on my mlok handguard. So i took it all apart and did some mlok research and found that the t-nuts are shaped wrong, square on the the install side but oval when turned 90%. I dremeled down the round sides so they fit in the mlok slots. A pain in th A$$ for something that says its for mlok but doesnt fit. Not sure if i received the wrong tnuts or if handguards are made different sizes as mlok. Also had to dremel the thumb switch thinner because it was hitting the handguard and wwouldnt stay up making it not functional.