You are correct. Both back wheels are utility wheels and the front wheels are off one of my scrap mowers with the heavy steel bases.
These mowers have the same size front and back wheels so I am still working on getting something that matches at a decent price. If you put small wheels ont he front the base slants forward and looks really silly.
This one is for sale so if you know anyone around the ACT that needs damm good mower sing out!

On a seperate note I havent heard from Ty in a while. Hope he is doing ok.