Just curious, what size blades/holders are you using the quad 0.5 on?
Seems to me ( in my head as I try to wrap my brain around this multiple radius profiling stuff ) that even though you and many others seem to love the quad 0.5, wouldn't if fall out of favor on larger sized skates or smaller sized? Hence the need to go up to a quad 1 for longer steel or down for shorter steel? Does that make sense?