Plans for a small tug/tow device for C172?

In article , DK
wrote:
Yes, our 172 does need a tug. We just got a new hangar, and you have
to push it up a bit of an incline, and at the same time go over a 3/4"
lip to enter the hangar. Nearly impossible for one pilot to do alone.
We tried pulling the plane in with a block & tackle, but we were
afraid we'd rip the tail tiedown off after one try.

Attach a winch to the back wall.
Attach a cable with hook to the tail tiedown.
Pull the airplane back into the hangar.
If using an electric motor, connect a remote control box to the motor.
Use your aircraft's towbar to steer as the winch pulls the aircraft.