My brother-in-law has a machine shop and made me a SpiderTrax dolly.
I think it came out pretty well, but the wheels are so old that they are uneven so I might have to buy some new ones. I am looking around for some new 52mm skate wheels so I can get it even smoother, Emm says that the flatter wheels work a bit smoother.
Also I want to give a shout out to Tore Ringdal for the incredibly generous donation he gave this weekend. Thanks Tore!