I’m looking to replace my raymarine auto pilot in my 1991 Hunter passage 42. According to specs the Passage weighs 24,000 lbs. The two autopilot’s I’m looking at are the M81131 for boats up to 33,000 lbs. and the M81130 which is rated for boats up to 24,000 lbs. The original is one of these except the previous owner painted white all over the housing making it hard to replace to original. Has anyone replace one of these before and which model did you use?