ST1000
I put an ST2000 (overkill but bought at discount) on a 25. Essentially the same thing.Just measure according to the manual. I had to get an offset bracket for the tiller but nothing major. Tuning it was the only learning experience. A fast response setting makes it a little twitchy and scrubs speed. Slow response and you can head up before the rudder takes effect. With a fin keel and short waterline length, the 25/26 doesn't track straight in rolling seas so the autotiller isn't useful. Really only good when things are calm. It's a step up from a tiller tamer but I wouldn't bet my safety on it.The hardest part was drilling holes in the cockpit for the pintle and power supply. At some point you have to commit to poking a hole. Just make sure you measured correctly.