I was originally going to use the 6" nylon wheels. Bought a pair, very heavy, they go round and round good and would work with no breaks or their drum drum brakes but I made a set of bicycle disk brakes for them. As you tighten the bolts in nylon wheel it changes shape.
Thanks for the pirep, Les, that will be useful for future builders.
I realize the Eagles are designed on the premise of enabling us to fly on the cheap. The temptation is strong to look for the most inexpensive components and build techniques available in order to meet a very limited budget. But I think those who have actually flown Eagles will agree that there are times when it is necessary to spend whatever bucks is necessary in order to have a safe and functional aircraft. If the budget doesn't exist for safe and functional components...then the decision to build an aircraft probably needs to be revisited. Cheap ain't the best option when 500' AGL over the trees or when transitioning a flying machine back to an earthbound craft.
Buy good stuff once and enjoy it, or cheap stuff and either hate it or replace it. This applies particularly to wheels, brakes, wing spars, AN hardware, and engines.