Good Morning, I have a 42 Grand Banks Classic, mechanical steering, 42,000 lbs laden. This season finds us busy with many upgrades for the Miss Ginger. Our kids are now in college, out of the house, we are empty nesters. With them went our "autopilot" as we have never had any such device except for helm tethered children . They required very little care. Give them a heading, an occasional sandwhich and soda and you're good to go! But, alas, they now journey to waypoints afar. Of course, we have mechanical steering. My priorities for an autopilot are affordability (remember TUITION), simplicity and reliability. Assume I know next to nothing about autopilots. Although a GPS compatible device would be nice it is not a priority. We currently have a Garmin 3210 (which is NMEA 0183 I believe.). I have also heard conflicting info regarding autopilots for mechanical steering. Some say it must be rotary sprocket type while others contend linear drives can work as well. As far as I can tell, either would work. I think I would prefer the linear drive as it could stand in if steering otherwise failed. Also, there is limited space within the console of my lower helm that would render sprocket instillation difficult. I am going bonkers trying to find a unit online. Probably a function of my unfamiliarity with non-human autopilots. It is difficult to determine what is included when looking at certain packages. I don't want to order something thinking it has everything only to learn I need to buy this or that. For instance, With the linear drives, do they all require a pump? Do I need a Type I, II, or III drive? And on and on... Thanks in advance for your assistance! John Thanks!