Turbos can be used. Vise can't.
I'm very interested in getting a DCT as well, but I was told no IT or SG
Pulled this from Turbo's site:
After you have measured drill specifications, start by drilling a pilot thumb
hole of 11/4†or 13/8â€
3 inches deep. Switch Gripâ„¢ requires the use of the
11/2†hole for the installation of the Outer Sleeve. The pilot hole will help
reduce “wobble†or drift keeping the 11/2†drill more centrally aligned.
Dense core materials make the drill drift more than softer materials.
Drifting typically occurs more toward the bottom of hole when closer to
weight block. The pilot hole removes 90% of material ensuring a more
consistent hole circumference from top to bottom. TURBO TIP: By drilling
the pilot hole 3 inches deep you create more room at the bottom of the Switch Grip. Having more separation from the bottom of the
hole and the locking mechanism allows for the hole to be cleaned out completely, minimizing the chance of any debris to lodge to
the rails of the locking mechanism. If debris lodges to the rails of the locking mechanism it makes the Switch Grip harder to twist
and lock into place.
SPECIAL NOTE: Switch Gripâ„¢ is NOT recommended for balls with ceramic cores.