While the debate is interesting "which rig is faster... " Light A cat verus heavy spin cat...
How about a light spin cat ? <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />
Besides who says that you have to rig the spi on a weekday evening sail ?
I do evening sails as well and I rig the spin when I feel like it and don't when I don't feel like it.
It is not like you HAVE to rig the spi.
Wouter