Originally Posted by Sheldon D.
Nolly from Periphery uses two Combustions live. You'll need to get custom Circle K gauges to make a low G# tuning work well but the end results are WELL worth it.
Not that you have any bias as to which is a better bass.
I've played the Combustion briefly and it was not particularly challenging to feel comfortable. I'm sure if I'd dedicated any regular practice I'd feel completely at home.