The spiral with Ho Scale 243 cars 9 engines

The spiral with Ho Scale with 243 cars 9 engines. The 15“radius at the top of the spiral was tough to overcome. All radius curves from Bachman ez track to make this work. 15“ 18“ 22“ 26“ 28“ 33 1/4“ 35 1/2“ All 9 engines that are used are old fictitious EMD Union Pacific Gp 18’s. Sold under the Bachmann name! Still has the little triangle on the bottom of the diesel tank. I would bet these are an upgraded version of the AHM. The AHM version only had two pick ups on each side of each truck. These have