Will CTS push pull pots like this.. http://www.stewmac.com/Pickups_and_Electronics/Components_and_Parts/Potentiometers/CTS_Push_pull_Pots_DPDT.html fit into an RG570 electronics cavity? And also, should I get the long shaft or short shaft? I was going to go for Dimarzio but they are...

...are they harder to turn than regular pots by definition? Or is it only a matter of the materials used?