Vince, the 107 was my first IHCC 20 years ago that started my Yellow Fever! I met some stranger named Hydro Harry and I've been addicted ever since! IMHO the K241 was the best engine Kohler ever made (in the K series that is). Smooth as silk without balance gears. Good luck!
If you are going to move anything but an extremely light trailer for the front, it really needs to have a caster wheel to support the weight so you can steer and not break spindles. Your other idea was good other than it puts far too much load on the front spindles because of how far ahead of the front wheels the hitch is located. I made this awhile back to move a very long trailer and it works great. It attaches to the quick attach mounting points on the frame.
Good to hear from you again - it's been a while. I always enjoy your insights, and that front mount ball hitch idea is great. I may have to copy it for my 782. Think I'll christen it my "MattGo" hitch! (Maybe I better hurry, before you get a patent on it!)