Folks:
Rescuing a seventeen-year-old model from the darkest recesses of the garage roof, I've found that the heavyweight (21 grams per square metre) Modelspan tissue on the open areas of the wing had gone brittle and useless: re-covering those open areas with Polyspan (with which I have no experience) therefore seems like a good idea. The stuff I'll be using is actually a Polyspan-type polyester tissue from Mike Woodhouse here in England, and he offers it in three weights: light (15 g/s.m.), standard (25 g/s.m.) and 'reinforced' which is so heavy I can't imagine using it. The model is 500 sq. in., 50" span and weighs 36 oz. with an OS .25FP-S: the wing has a D-tube L/E and is nice and stiff even without covering. I'm a weight-saving fanatic, so would it be all right to use the lightweight grade, or would 'standard' be better, bearing in mind that the weight penalty would be very small? All advice gratefully received.
Regards
John