Hi guys,
I got an email awhile ago for these but forgot to share with you all.
For those that want to make (or already have) a pole storage tube out of PVC pipe. You can purchase pre made locking end caps.
No more getting frustrated when the twist ones don't untwist or they get stuck. You also don't have to worry about your poles busting through the end with these on.
Price is about $85 a pair or you can get a single for roughly $44
Any rhino rack dealer (such as Autobarn) can get these in for you, even if they aren't on the shelf.
Hope this helps a few people.
Cheers
Evo
http://www.rhinorack.com.au/products/work-solutions/conduits-carriers/conduit-locking-end-caps-100mm-_lse100(these are crash tested, and do meet adr approval)