The forum member brushcutter built a split shifter for my Max IV and it works great. Before I had my T-20 set up to split shift, I'd have to rock back and forth while working both sticks to get the T-20 to go from forward into reverse or reverse into forward. With the T-20 now set up to split shift, I put one stick into forward and a slight jiggle on the other stick, and it then goes into reverse. My T-20 goes into forward or reverse so easily now, that I would'nt even consider changing the shifting back to the factory set up. I now have the ability to skid steer or counter rotate if I choose to.
After Brushcutter made my split shifter we both drove down a very muddy trail. When I could,nt skid steer out of the mud I then tried split shifting the T-20 into forward and reverse so I could counter rotate and change lines in the mud. I then found out that this was a big mistake ,because the mud was too thick and I smoked the new clutch belt that I'd installed two months earlier. I have a 25 hp Kolier motor in my Max IV, but I've learned in some situations like this, that its not enough power to counter rotate when the mud is really thick. In light mud, leaves, and in the water a split shifter works a whole lot better than skid steering does.