Paul has the right idea. I have a spring assist on a 107 and i found it in a junk pile for 5 bucks.... Trust me, your life will improve dramatically with it, especially if you use a snowthrower.
Next though... i believe i'm putting a small hydralic pump on it and 2 spools to both lift and angle my blade. I've gotten tired of crawling out of the cab to do that....
I will say that you do have a handy and rare little item, as so far, my 107 is the only Cub i've seen with one on it, and boy is it nice.