keep my SRAM ceramic bearings and not have to mess w/ my current Q factor.
There is a lot of misunderstanding around about Q factor. It is the distance between the planes where the pedal spindle contacts the crank arm.
It is unrelated to BB design or bearing location.
For a great many years manufacturers have kept this within a couple of mm, for the simple reason that the basic frame geometry limitations which require clearance of the crank arm to the chainstay, and clearance for the shoe heel at the back of the pedal stroke, have not changed.
Campagnolo for instance has kept a constant Q factor from at least the days of C Record/square taper right up to today. Likewise with Shimano.
Because some BB designs are wider than others, the shape and angle of the crank arm varies to make up the difference, but the Q factor remains constant.
For instance SRAM's BB30 and GXP cranks have identical Q factors.
There IS some difference in ankle clearance to the crank centre at the forward pedal position, though not as much as you might think
There's sometimes a buggy.
How many drivers does a buggy have?
So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.http://www.youtube.com/watch?v=GekiIMh4ZkM