EXCELLENT!
I think the RotJ was light grey. I also think the patches should be white and we can then weather them to our own tastes.
Fastenings? a button is accurate, but velcro would be easier to get on and off at cons/troops, etc, and is more adjustable than a zip.
A couple of inches past the wrist would be good IMO
Number of sections on the patches? Hang on, I'll dive into the ref CD. Back in a mo.........
OK here's a fairly good pic of the glove from the Ref CD (Thanks Braks & Secol):

Very light grey gloves. White, but dirty patches. 5 sections (4 lines of stitching) on the back of the hand patch. Don't forget the patch on the left hand is shorter than the one on the right.
I'll be keeping an eye on this thread. 
Si
Si