A few of you have seen my transmitter knobs I use on the sticks on my Sprktrum DX7se and asked about them but I could not recall the website. The website is called Progressive RC. Here is a linkto their RC Styx products. I have both the 3/4" knobs and the 1/2" knobs but currently have the 1/2" knobs mounted: http://www.progressiverc.com/catalogsearch/result/?q=styx I like these knobs better than stock sticks with the barbs on the ends. The 3/4" knobs are good also I just find the smaller ones feel better for my thumbs. Both sizes have nice concave indentations in the tops like cups for your thumbs.