Sir William, the combination of arming cap, maille coif, cervelliere and great helm is something I think I might have tried once for combat, never again, the weight is unbearable lol.
I do put them together for show and tell now and agai, when I have the room in my arming chest to transport it all.
The open faced bascinet with aventail is very nice to wear if not a little weighty on the neck at first. A chin strap is a must as the bascinet can ride down and cut at the bridge of the nose.
G