The Axworthy Ghost setup functions something like a ski lift in that there’s a continuous line going all the way around.  To help out I needed to get some wheels for the line to go around.  I was keeping my eyes peeled when one day in August on my way home from work I spotted these sitting out by the road waiting for trash pickup the following day - a set of four wheels that looked like they were from a baby jogger or the like.  They were in great shape and all had quick-release levers on them which would make adjustments somewhat easier.