Alright, will check that out, thanks.
Another question I had about these; on mine the protrusions from the guard towards the hand are rather subtle so they don't get in the way, but on TVV's example and some others they seem more substantial:
Does that get in the way of the hand at all when using a hammer grip? I'm wondering this shape it is a way of encouraging a saber grip, with the thumb and index finger nestled in the curves of the guard.