Can you get cheap cordless electric screwdrivers with the ability to drive very very slowly, ideally with the speed limited?
I have a hand grinder for coffee beans, and the handle slots onto a standard hex driver nub on the the main body of the grinder so that a standard hex driver fits perfectly.
I need something with a relatively decent amount of torque and I have a £10 Mac Alister driver from B&Q which works okay if a little *vigorously*. If it was just a bit slower it really would be ideal.
I have a 4v battery Worx screwdriver I picked up from Homebase for £10 - it is very slow turning - just looked and seems they have gone up quite a bit or I did get it really cheap.