I recently received an A-B-A set of F-3 demonstrators from Len.
(modeled after the F-7 demonstrator)
They are beautiful.
He used early Lionel F-3 units with the horizontal motors.
He cleaned, lubed, did a motor tune-up, and ensured they met factory specs.
They run like a dream.
He also installed his "master-sound" horn, which includes a second horn. Both horns are tuned to a different pitch creating a much more realistic sounding horn.
If you go to his web site you will see more information on the remarkably detailed painting.
I have looked at on-line at photos of the prototype and if anything, Lens looks better.
