A local machinist is going to machine another set of four wheels for my WW 1.0 for less $$ than JCC charges. Before I had him do it I was wondering if the originals were a certain type of hardened steel that I should be aware of. Also, does the WW 2.0 also use the same wheels? I was going to order a few extras because the price is reduced if I order additional wheels and I thought I could sell them at cost if there was enough demand.