I assembled my Dax Friction Drive with the Tanaka 33 that was listed for $89, and made my own remote throttle control/tester and plastic u-bolt to frame pads made of milk jug cut-outs. :-) What a wonderful day. Now just waiting for daylight to fire it up so the neighbors don't hate.
I'm using the bare cable, a little rough. Tip: thinner gear-specific cable works best, and shrink wrapping the cable after running it through the smaller hole (housing side) would probably help a lot, for finger comfort. The control works with 2 fingers or thumb easily. (do not grease cable where it touches fingers!) I am trying it out tomorrow, waiting for worm-clamp throttle lever from friend via USPS.