The AU site is a interesting read and there is a lot of information to sift through.
I can understand the migration of the span weight moving the center of lift over the blade surface, but still find the almost total disregard for static weights baffling.
Surely if you start with a blade that weighs say 15 grams more than the other 3 on say a 500 you are on a hiding to nothing as Max. balance is 150grams at head, there fore the blades overall weight is very important.
(
on the 500E you balance the head without blades to start I understand,so GPs r
emark should not count) Also
where the excess weight or lack of is relative to the blade length, will effect the flap characteristics of the blade, again causing balance or & track problems.
The paint scenario is rather interesting, as if you run 22\44 and are painting blades to comply with POH you will be either sending blades back for stripping and re paint on a monthly basis or trying to blend in the leading edge daily, with a build up on the leading edge.
O happy days 