Oops, the Aurora kit the OP is referring to is 1/16th scale apparently.?
Edit: An electronics supply house should have slightly heavier gauge wire also.
I’ve never been big on coloured plug wires because they more often than not seem to be out of scale (too fat). However, I recently found this .020” stuff at a local electronics supply house. I haven’t used it yet though, so no installed pic.?
I don’t think bubbles are too much of a concern, especially if you are blowing it through an airbrush. The mess on the lids is my main irk. I have had some old testors paints that I couldn’t get the lids off with a pair of pliers.?