a 3" or 2" backing plate?

[bcgreen]

I have been contemplating purchasing a small backing plate, mating to a drill, to get those small spaces.
I see there is the BOSS™ 2" Backing plate and the 3 Inch Dual Action Flexible Backing Plate.
Will the 3" DA work with the drill adapter and if not then my question is mute.

[Mike Phillips]

If you're just going to use the DA backing plates in a drill, you could just insert the 5/16" threaded stud into the jaws of the drill, tighten down and go for it.

This will cream-out the threads BUT if all you're going to do is use it in a drill what would it matter?

I think there's a drill adapter too, check out the Griot's page on the AG store

[bcgreen]

Which is more versatile, 3" or 2" backing plate - Boss 2" or the DA 3" backing plate?