I think my Ultimate is a 100.
This is it.
The bit the bass sits in tapers backwards, making it great for wider necked basses, they sit towards the front but narrower ones sit towards the back. There's a wide piece of rubber clips across the front to stop them coming out, but I doubt they would 'cos the whole thing leans backwards slightly.
I don't get where someone said they're big ? I don't think they're any bigger than a Hercules model. They just suit wider necked basses better, and the stuff on the legs is better.
My TRB6P wouldn't fit in a Hercules stand .
They're also significantly cheaper than the Hercules models, around £20.