I'm fairly sure that flying mullet was joking and likely shares the same sentiment as us. Thanks anyway though.

Well, I've ordered that bit, and a second larger one for the system screws at that since they turned out to be quite cheap. When they arrive I'll tell you how it turned out and whether or not soldering actually is needed or if, as the pictures I've seen seem to say, it's just clipped inside the cart and easy to slip in and out.