Ralph,
Tthanks for all the kind words.
I bellieve if you try this method you won't regret your decision. I learned this from a guy whohas beenmaking molds of differnet type of aircrafts for almost 30 years.
glass cloth instead of ply doublers provides more room for equipments specially in smallen classic patterns with theirnarrow profile which enough room for tank is always a challenge for me but this does not mean that it justcould be used only in small birds. you can use iteven in yourbigger planes with no problem.moreover it is much lighter than ply , fuel proof and resistant to cracks in different directions depending on the texture of the cloth you use and you will never be concerned of delamination of the PLY just where joints to the formers duringshockingloads.
As you know while using PLY doublers it is needed to reduce the width of the formers that are going to be glued to the doubler in order to prevent anover contoured fuselage on the sides, but glass cloth adds an ignorable thickening to the sides therefore I do not reduce the formers widthbecause I squeezeout any excess resin with the visit cardand perhaps just a slight sanding of the formers is all I need.

Ehsan
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