RWTF,
Some people call a breast drill an "egg beater drill". I too have a bit brace set up with a screwdriver bit,it generates a lot of torque and works very well as long as you use a bit with parallel sides(tapered bit is bad to slip out).
Don't worry about cheekweld,otherwise you will have a hard time shooting a drilling.That is what I meant by "shoot it like a shotgun". Also don't use the sling to shoot with,use it only as a carrying strap.
Mike