by Michael S » Sun Dec 29, 2002 5:49 pm
I may be wrong on this but here goes: mounted heads come pre-attached to the ring. Unmounted heads are basically the skin, which must then be attached to the ring.
I can't help you with the GonBops heads but, if you're really adverturous, I had a friend here in AZ who bought a piece of cow hide and shaved and shaved and dried and soaked, etc. and whatever else was involved and made his own heads for his early Tocas. I like that idea of "becoming one" with your instrument. He didn't have to do it but for the cost savings but with the vintage congas, with odd sizes, that may be the way to go. He made it sound pretty simple, actually.