If there is a mechanical lockout for the surge master, you can pretty much count on there being nothing special inside the drums.
Depending on the slope into your garage, the brakes may not have been brought into play.
TT 2015 19RD "TheJayco"
TV 2003 F-350 "Montblanc" - Housebroken chore truck
Sitting in The Cheap Seats.
And proud of it!