You may consider doing external sliders as an alternate. The one's I modified are former bobbers, but the real concept came when I didn't have a bobber and used a piece of stick. I used to just cut little slits into the stick but sticking a cheap hook into the stick worked really good. So I use the eyelets from cheap hooks for the sliders. Put those eyelets over the ends of the center tubes and you will won't have to worry about the line getting cut up by the tube ends.