The version 4 Switch bar has the exact same chicken loop assembly as the Ikon bar that I have which I did a modification to in the fashion you describe.... basically because I hated the pu covering on the main line.
The problem you will have with using 6mm chord of any sort is that it wont fit in the rotor head groove under the black plastic rotor head cover.... 3mm is the correct size. The other problem may be its ability to splice.
To get a 6mm main/depower line I used 2m (give or take) of 3mm dyneema.....
I made a loop with a locking splice of the correct size in the middle.....
then passed the tail of the splice through the entire length of the 3mm dyneema.
You end up with a 1m length of 6mm dyneema with a 3mm loop at one end. The loop will fit around the rotor head retaining lugs and in the groove. The 6mm dyneema then passes through the cleat, around the splitter bracket, and back through the cleat. Put that through the handle or knob you intend to use and tie a knot. Line trimming is easy by adjustment of the knot at that point.
Waxing the mainline stops fraying entirely... or at least stops broken fibers from fuzzing.

snalberski said..
The problem you will have with using 6mm chord of any sort is that it wont fit in the rotor head groove under the black plastic rotor head cover.... 3mm is the correct size. The other problem may be its ability to splice.

Yeah for this I pulled the core out through the sheath and wrapped that around the lugs. That was with the 5mm rope though so the core is probably around 3mm (but as it's a loose weave it is easy to flatten around the lugs, 6mm might be a bit tight though. Sounds like waxing dyneema is the way to go though. What wax did you use and how often do you wax it? I probably need to start doing this on all my lines.

LucienSanchez said..

Is there a reason most bars use dyneema over this type of coated spectra?

Yep.

haha a photo says a thousand words. Yeah I noticed a bit of fuzz starting to form on my rope after its third session. I rock climb with a similar polyester sheathed rope and it fuzzed up a little but then stopped getting worse after a while. I was hoping this would be similar. There aren't any sharp edges on the switch bar but that Dyneema looks like a good price and more suitable. Thanks for the photo!

Check the source of your "Dynema" - plenty of Chinese and other products that call themselves Dynema (or the seller says its Dynema), but are not and are much lower quality and wear quite quickly compared to the genuine article. My understanding is that the genuine product is only made in the Netherlands and the US.

Amongst other uses, I use it on my Dynabars and the genuine stuff lasts at least a year before it starts to look a little worn, but when I got caught with non genuine stuff, it barely lasted a couple of months. You get what you pay for I guess...