Using a Floor Jack as a Transmission Jack?

I just put my tranny in my Scamp not long ago and I couldn't get the car up high enough to slide the tranny under the car on a jack. SO I slid the tranny under the car on cardboard and put some ratchet straps around the front and back of the tranny and hooked the ends to the frame and ratcheted the tranny up high enough to put the floor jack under it and put it in by myself.
Simple and cheap and no sore back. lol