Hm, i never had that problem of it being too tight there. Though you can extend it if need be, especially if it is resin. you can add material to the lower half to make them deeper. Id recommend fiberglass and then bondo on the outside to smooth it in. You should reinforce MOWs gaunts with fiberglass like he recommends anyway to troop them so be sure they are durable enough. So that would be a good time to adjust the fit. They should be fairly snug though so they arent flopping around.
I never had much issue with resin or fiberglass gauntlets. I rather like them. I do however like when the bottoms are vac'ed. This is because it gives you some flexibility for putting them on and taking them off. RKD's magnet method is great and the vac'ed bottoms lend themselves well foe that and for velcro closures. When i had full fiberglass ones i used these clip thingies..but they were hard to get off without help, and even then, it was my wife squeezing her little fingers in there trying to push the release. So the bottoms being Vac'ed is a big help.
Screen used ESB were fully vac'ed, and that type is lighter weight, but if you have a metal rocket you'd have to reinforce where its attached. But over all they are lighter, and technically more accurate.
