A couple of years ago, I built a yard tractor wheelbarrow. It can be seen on this website under photos as " 1953 Simplicity ". Pay close attention to the hood decal spelling.. I put Neon Disc brakes on the dump cart and many other upgrades including 8 lug aluminum wheels and 33-12.50-16 mud tires, headlights, tail lights, stop lights, horn, electric start , Blazer k-5 tires and wheels, and more.. My problem now is, I'm building one last one for my Grand Daughter from scratch using an Allis Chalmers B hood and grill, cut down and narrowed 2 inches to be more eye appealing at tractor shows.. Now the dilemma, I can't find a set of calipers small enough to adapt to this homebuilt trailer axle for this application. The neon calipers are too big and I ordered a set of 2000 VW Beetle calipers thinking "Small Car, Small Calipers".. Not so. I looked at utv and atv disc brakes. They all take a rotor about 1/8 to 1/4 inch thick. I need to go over a 1/2 inch thick rotor from a Rav 4.. Any ideas would be appreciated. I have over the years contributed many "fixes" for Deere dozers and backhoes on YT. Thanks , all.. Roy Suomi