Climbing Perches for Tubs?

I've recently acquired a Colombian Boa and I know right now he's only looking for ways out but down the road, I'd like to put in something he could climb on, as they are semi-arboreal and will use them if given the chance. I guess, to sum up my question, is there anyway to make or put a climbing branch in a tub and still be stable? Could I get some ideas as well? I wouldn't mind doing a DIY project either, just need to be pointed down the right path (:

I know someone who just gets branches cut to the width of the tub, and just puts screws through the branch into the tub from the cut sides. (Obviously melting holes into the tub first)

You can also look up DIY green tree python tub, and there are more ideas on how they secure perches/branches.

This is something i tried out for a few of my ball pythons. I did one branch through both sides and the other one i put through one side of the tub and used the other side of the branch as a "leg".
http://i1172.photobucket.com/albums/...psw251m92o.jpg


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You could also make a small "jungle gym" out of PVC pipe. If you don't cement the joins it can be removed, taken apart, and cleaned very easily.

Thanks all! Time to get crafty, lol.