Just received an answer from Gary Ernst at Robart. They make a bushing to reduce the the axle hole on the Robart strut from 1/4" to 3/16". They are $3.00 each. Ordering today. Now I have to get the axles from BVM as they did not come with the Robart package from Planes Plus. Guess this'll solve problem; feel bushings and 3/16" axles should have been included as part of the package from Planes Plus.
Saludos,
Pedro