I have the Brodak stooge(called the Tru Launch) that I got from Leonard. I mounted on a approx 2 ftX12" pine board, use two very large spikes to spike the board down and trot line cord to release the stooge. Roll it up kite cord style on a 1/2 inch dowel rod. Make your stooge line as long as your longest lines, say 70 feet and do a half hitch around the dowel for shorter lines. I use hot wire wire to attach plane to stooge, loop wire around tail wheel and remove when not stooge launching or build with a plywood skid with a 1/16th hole and attach a permanent loop for stooge wire which can be snipped off anytime if you desire.
I was extremely apprehensive about using a stooge but 150 plus launches and no problems-the device is very reasonable and I highly recommend it.
I would suggest you develop a routine for using to minimize the chance for mishaps. I always place the stooge line to the right of the handle, always walk to the handle behind the lines, always pick up the handle, check the controls and have lines moderately tight before touching stooge handle, always double check to be sure stooge connection to plane secure before starting engine and always have plane angled slightly to outside of circle-do not jerk stooge line-a slight steady pull releases smoothly.