For cosmetics, and of coarse accuracy, try to keep your front cover strips on the thighs to the 20mm.
As to the backs, you can certainly go larger, but try and keep the back of the shins to a similar size to your rear thigh cover strips.
For example, 40 mm thigh back cover strip and 40 mm rear shin cover strips. In most cases the wearer will have larger calves as well .
Recently I help a new cadet make a very large internal shim for the back of his thighs 100mm we then cut a filler piece, and made ABS paste to fill the small gaps. We then simply made a 40 mm cover strip and glued it on centrally.
His calves were also huge, so had to make the 40mm cover strips for the back just to get them to close. In the end it all looked great, and he is currently waiting basic approval.
He then intends to apply for EIB.
I will get hold of some images of the thigh work and post them up in the next couple of days to better explain what we had to do.
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