There is nothing in the CRL about the method used to enclose forearms. The only mention of enclosing forearms at all exists at the basic level.
Not granting Centurion based on the use of velcro in the forearms is not only the wrong thing to do, but not in the spirit of the award. If the forearm velcro was unsightly, obvious, or sloppy, only then are there grounds for asking a Centurion candidate to redo their forearms.
While Vern does wear armor that is too small for him.... and somehow pulls it off... there is no forearm out there big enough for his size. I am in the same size boat.... unless I make cover strips so large that I wouldn't even approve my own centurion application.
-Eric