Bruce Hansen's Erector 10½ Truck Models
Bruce writes: "These are the 6 different truck models built with a 1950's 10½ Amusement Park set. I figured as long as the chassis is the same for all six, I might as well build them all.
The only trouble spot I had was with the initial chassis assembly. My five 10½ sets all have MB 18 1/2" girders with 35 holes. The manuals show chassis with 36 or 37 holes. I had to move the seat forward a couple of holes to get the different rear ends to fit correctly. The Universal Crane model uses the MJ electromagnet; I powered it with a transformer from a Senior Powerline (1968ish) erector set."