After letting it cool down and firing up the original known working cartridge. 

It finally took off and started working again. These drives are definitely very very buggy. 

CC333: After sticking in the first cartridge of the ebay lot, I got Servo Error. Then every single cartridge including my good one, did the same thing. Recycling power gave me this loud screech griding noise and a motor speed error on my good cartridge, Thought the heads crashed. 

So i let the enclosure cool down, power supply and all. Fired it back up and its working again.

But again the other carts say Servo error. So they are garbage.  

I may need to pull the drive back apart and check for molten rubber, or lithium grease hardening in the head pivot points, and the spindle motor. I didnt do that.