In the 1946 & 47 Walthers catalog they have a laundry list of what will be "improvements" ..pointing out all the shortcomings .....alas post war production never seems to have happened ..
the Tenite ( plastic) driver hub& spokes crack at the axle ..screws strip out
motor only mounts on front ..... too much bounce
aluminum frame filled with many holes for all the bits ..are flexible ( twist)
Walthers did supply engines for the 1939 World's Fair claiming they were Poly-drive .... I have one of the engines ...no Poly drive ..
Post war GMC / All Nation did a great job reworking all the bits from the Varney 460 into many steamers big and small ....and the quality worked .... and found a market for several decades ....... Walthers polydrive ... not so fortunate ... with luck I'll be posting some photos and video of there Northern ..the biggest offered .. also have a Mike and Mogul both run ok + - ( all with the polydrive ) ...darn few seem to be out there these days .
Cheers Carey