Hi, What soft tube Comp fittings are considered the best/strongest tube retention to prevent tube pulling out? (ideally available in Au) Are they better than a barb with a hose clamp to really lock the tube in place? What mods can be done to improve retention? Alternatively - Where can I buy Decent QDC fittings (bulkhead mount and barb) for 7/16 x 5/8 (12mm/16mm)Tube which I would like to convert to? Backstory: I'm onto phase 2 of my external radbox and the 1/2" x 3/4" tubes to the PC will be mounted on a 90 degree fitting on the back of the box. *I'm stuck with this tube size instead of my preferred small size for this run as my Quick Disconnects at the PC are this size and I cannot find a source in Au of smaller ones Currently tubing in Radbox is internally mounted exiting through holes in the box and firmly anchored to prevent being detached. The new config will have tube connections outside the box at the rear on 90 degree swivel... What soft tube comp fittings have the best retention? It's not like they will be yanked around or whatever... I just have a concern that tubes could be pulled out of the fitting. I looked at the EK ACF which is touted as being retentive but there is only 1 left in stock at PCCG and the reviews say it's shite due to the metal threads flaking. I will be using EK ZMT Black 1/2" x 3/4" unless I can get smaller QDC's.... but either way I need really solid holding Comp fittings for the radbox end .