I'm going with these roll bar tube clamps to mount my roll bars to the frame. The problem with them is that there are opposing Allen bolts that will be a problem once mounted as there is only access from one side. So he machined an insert and tig welded it in place. Now both bolts are accessible from one side. My plan is to make the roll bar fit with the hardtop on so it adds a bit of protection. Only negative to that is that they have to be straight up and down and not high enough for my tall passengers. Anyway, he also chamfered the interior edges in order to pull the bars straight up and out of the waterfall if necessary.