I don’t think there’s enough material left. When I drilled them the screw heads popped off and left the screw shaft still in the coupler. I’m not sure if I have the tools to drill and tap the rest of it. Also I don’t know how much of a shoulder is left in the outer hole. It’s funny but I was looking on Amazon for replacements and found the exact same coupler but there was a statement in the part description that made me laugh. It said “Not Easy To Remove”. I emailed Sienci and Andy said the were out of V1 couplers and the V2’s are different and I would probably have to drill out some rubber. Not me. He said to get solid ones. I ordered from Amazon yesterday and should be here next Thursday. Thanks for trying to help though.