I've got 16 mm clear pvc tubing from the gardening section of bunnings and connect it with the pope brand garden irrigation connectors. I use 1/2" bsp brass male capillaries into my condensers. The pope brand snap sure adapters work great. The tubing needs to be heated (left to sit in hot water for a minute or two) to stretch over the barb fittings but it goes on with a bit of encouragement and is water tight. It's cheap and you can trim the tubing to the length you want so storage is easy. Also I went for the 16 mm option with 19 mm adapters because the smaller tubing (12 mm) was affecting my pump head pressure. I also tried other set-ups with the braided line but found they suffered from the same problem.
I have my RC and PC connected together in one unit so all the plumbing stays connected to it but I disconnect it from my water reservoir and radiator for storage. These connectors could easily be used for plumbing the cooling for completely modular condensers and detach for easy storage. I've found the adapters require very little effort to connect and disconnect.
Anyway, here's a photo showing my plumbing (column looks to be on a bit of a lean but I think it's just a camera effect)
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Another benefit with the clear tubing is that you can see if your cooling lines are filling up with air, which happens as the condensers start knocking down vapour (dissolved air in the cooling water bubbles out at higher temp and gets trapped in cooling lines, as well as condensers - always run condensers in at bottom, out at top for this reason).
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