Why the issue of drilling into the cage? We are required to drill 3/16" holes, if my memory serves, for tech inspection. It does not seem to me that drilling two holes for screws would be any worse.
In addition, the knee bar is optional so I would assume that one can do anything to it without tech concerns.
I, for one, don't like making things "permanent" as I have found myself wanting to make changes as I have progressed. There are some great clamps, but they can be $20 - $30 dollars each. As such, roll cage clamps can get expensive. Does anyone have a source for less expensive clamps to share with the group?
Big Dog