I agree with rugmunching! leave well alone. I'm a Stopgap 1200 man personally, you pay more, but get better results, better flow, no rubbing down...
Bought mine a few years ago. Turned up looking like they were second hand. Contacted the Maw, he said I was paying for the concept, not the style...
Stopgap 1200 pro Uzin NC163 Stopgap 300