Given the way the tubing is routed there you'd be much better off with a 45-deg elbow fitting rather than a 90-deg elbow. I've also had several bad experiences with leaking compressions from manufacturers other than Bitspower - BP rotaries are the only ones I'll use now, and I've not had a problem yet in about six loop builds for client PCs. They are expensive, yes, but for peace of mind I'm prepared to pay extra.