that sounds like it works, surgical tubing used for slingshots but cut 2" sections then slip them over the shafts looks good.
also while we are on the subject of judo's when your shooting in the deep snow after stuimps or rabbits get some bright string like fly line backing or even yarn and connect it to the nock ened of the shaft (I drill a tiny hole through the taper area of the nock) and then cut the other end so it it is about 3" longer then the point of the arrow (while connected) now when you have the arrow nocked drape this yarn over the shelf so when you draw back the arrow to shoot it comes back right under the arrowa nd doesn't interfere with anything .
when you shoot and you usually can't find the arrow under the snow because it skips along the frozen ground under the snow for a while , you just look for that long section of bright string or yarn and you will find your arrows 5 times as fast as before which means the fletching may still be pretty good and not all wet and flat like most of the time.