Just a suggestion if your going to go with a "tube in a tube" holder, why not weld the smaller inner tube to the frame.... the reason I say this is where I'm from we have alot of mud
If you are trying to fit the light bar in marginal light things like this normally only get fitted when its already dark enough that its a stuggle to find the pin when you drop it.... add to this that small stone or some sand thats stuck at the bottom of the tube when you trying to fit your light bar in there and get it low enough to put the pin through
But if the bar fits over the locating tube.... hopefully no drama's lol
I have mine setup to hold on with hose clamps. All that has been done is a piece of tube is cut in half and that sits over the rollcage. Then I have hose clamp front and rear on each side to hold it on. Simple easy and big hose clamps have an amazing amount of strength!