I just received a call from Acratech. My GP ballhead is on its way back. They replaced the base unit. Apparently the heat from storing it in truck - thru numerous Arizona summers, part of the rotating mechanism started to bind. So, for the princely price of shipping - about $5 each way - I essentially have a fully re-conditioned/new unit - no charge for parts and labor.
She noted that I do have one of the earlier units - as the anodizing that they used years ago, has turned an ever so slight purple tint to the black with the heat. They have experimented with numerous anodizing techniques/materials and found one now, that stays black black across all conditions. It could be bright purple with bilious yellow poke-a-dots and it would not matter to me. It just works and works very well - first time, last time, all the time.
Anyway, I could not be happier.
I do have to say that when I talked with them when I purchased the unit, they said - anything goes wrong with it - just send it in and they would fix it. You can't ask for anything more than that. I wish all companies would stand behind their products like Acratech.