Can a brompton be rolled folded on the front wheel instead of the rear rollers?

I have a 5 speed brompton with dahon andres stem extender.(See brompton with dahon andros stem advise thread) Unfolding the dahon stem puts a lot of pressure on rack so I have removed the rack and I prefer the looks and lightness with out it.
Bike balances ok without rack unless loaded, and I don't want to go for mudguards to mount wheels on as that will be more easily stressed than the rack.

Can the Brompton be wheeled on the front wheel folded?

I have tried this and the only problem seemed to be the IHG toggle chain catching on the spokes. I could use a front mech and a 2 speed drayler to get a 4 speed.

If I went for a single speed hub could I wheel it on a combination of front rollers and front wheel ?