VR6ofpain,
I was pretty sure someone would look more at the y-split than my tag.
Even though the Thing for myself was my personal heatshrink.
I have to admit that the idea of the y-split is not entirely mine. The method was found from Techflex's catalog (page 42) and I only did reinvent the usage on the Y-split. Like you thought it is done by using shrink tube to attach the beginning of the flex and then wrapping the flex over itself. It did not work for me with the first try. The teflon on my wire is really slippery and that does have some challenges. As I did only have normal (one layer) shrink I used some tape (as Techflex catalog suggests) under the heatshrink. I did not want to use only tape since it would be visible, hence uglier.