I don't like how high I had to extend the screw (elevation) on the T/C sight on the Rene.
It's the same with the TC tang peep on my .58 GM barreled TC Hawken. It's as high as it will go and still grab threads. I worry about it sticking up like that, but haven't had any problem with it so far. It's a lot trimmer than the Lyman sight, but sight adjustment isn't nearly as user friendly.