Using cordless drill

[D8R]

Have been thinking of using some motor/gearbox from cordless drills for next project (maybee). Did buy a couple Bosch drills 12V with a rating of 30Nm! If it is useable everything needed is inside that drill. Speedcontrol and direction controls could be adapted to a servo. Only problem was that the chuck is sitting real hard, will have to cut it apart.
After reading the ongoing tread about the Bell 50 tonner, checked out Comodrills site and there biggest motor-gearbox was rated 10Nm and a pricetag of £90, thats about $140, more than the Bosch drill.

Anyone with expirence of using drills as power source???
Dan