Hmm, while I agree on the slower speed practice I would humbly point out that I have been using the fuel tubing beak on the nose wheel ever since I began in this hobby the first time around some 6 years ago. Never once did I nose over due to this break.

On a tail dragger you would likely see a nose over problem, but I don't think his was a tail dragger.

I would think metal washers of any kind would eat away at the plastic wheels so I would avoid em. (Im new and inexperienced but this seems logical to me)