I just tried it with one of the spare barbs that came with the kit, and, yes, it did seem to go on. It's slow and painful and I burned myself a couple times, but it did work. I can try using the pliers on my knife to see if that helps any. And I boiled water on the stove that might work better as well. Thank you! What I'm confused about though--how would I do this once the parts are mounted in the case? Pushing things together with the reservoir in the drive bays would be the hardest, IMO. Given that the reservoir/pump has to in through the front of the case and everything else is inside, I can't assemble the loop outside and then install it.