Henry .22 hammer extension - GrovTec US Henry Big Boy Hammer Extensions

I use the hammer extension on a H001 Henry .22 lever action. It makes it possible to work the hammer when a scope is installed on the rifle, making operation much safer if decocking on a loaded chamber. The only issue I have is that the back of the bolt catches slightly and has to overcome some resistance as it passes the extension to set the hammer. It's not a huge deal and isn't noticable if you work the action normally but if you are working the lever gingerly you can feel it catch a bit. It can't really be moved back either to alleviate the issue.