Thanks everyone.
The kit is a PSI 7mm 24KT comfort pen kit from Ryan at woodturningz.
The curly koa is from Bill at AS.
The kit uses the regular 2" tubes just like the slimline, just different bushings. The real heart stopper comes when you have to part off the 1" of wood on the front of the first tube to make room for the rubber 'comfort' grip. And yes, it would actually be easier to leave the wood and skip the comfort grip.
However, this is what the customer requested, and yes, he was happy with what he got
Thanks,
JohnPayton