I have Cataracts with Oar Rites also and I haven't had a problem with any slippage, at least not yet. The Oar Rites really seem to cinch down tighter than snot against the rope wraps. The first time I ever saw Oar Rites used was with Rod Bush of River Otter Guide Service. I asked him how he liked them and he said that they were great although they need re-adjusting every so often. Believe me, this guy had put some milage on those things so I'd imagine an occasional adjustment due to slipping is to be expected. He had them attched with just the two factory screws also. He only used the Oar Rites for stabilizing the boat when anchored, don't know if you use them in place while rowing. That would surely cause slippage as a lot more direct stress is added.

As far as putting an extra hole in the Cataract itself, I don't think it's going to hurt at all. Just my opinion. Remember that there is a huge hole at the bottom of each oar where the blades plug in. The connecting hole should take a lot more stress being at the bottom of the oar shaft compared to where the Oar Rites are attached.

Justin
CEO, Sauk River Steelhead Ranch---<*,))>><