Ted Ernst replied So a note of caution and mechanical feeling is in order. Your spoke selection will be a factor also
As a wheel builder of many years I have to agree with Ted with his closing paragraph .His comments make practical common sense on the subject. There is no short cut to this job but only use only the correct washers manufactured for this purpose. I have always found when I've needed to use them the installation of these washers does tend to take more time and more care taken in the early stages of the build up.
My advice would be to any folk contemplating needing this form of construction should seek the use an experienced wheel builder.
Doug Smith
North Dorset
UK