![value of stec 50 autopilot value of stec 50 autopilot](https://www.picclickimg.com/d/l400/pict/124918054960_/S-Tec-Autopilot-Pitch-Trim-Servo-28-volt.jpg)
Sometimes over the years part numbers will change and the part numbers reflect the specific settings of the servos/controllers/etc.
#Value of stec 50 autopilot upgrade
As part of our upgrade path the servos will be inspected to ensure that the part numbers, clutch settings, cable tensions, and servo start up voltage are the same as required for the new system. For example if you are upgrading from a S-TEC 55X to a 3100 you can save about $10,000, with the price being $9,995 if you have electric trim already or $11,495 if you need to add trim! Although it is not as simple as swapping out a control head and fly away, there are some re-wiring changes and inspections that are performed, and possible removing or changing of hardware. If you had a legacy S-TEC system then we have upgrade paths for you as you can retain the existing servos to help save you money.
![value of stec 50 autopilot value of stec 50 autopilot](https://i.ebayimg.com/images/g/JuUAAOSwRfxb9epG/s-l400.jpg)
![value of stec 50 autopilot value of stec 50 autopilot](https://www.euroga.org/system/1/user_files/files/000/049/751/49751/56cd9231f/large/C442D436-A1CD-4439-9A01-952CB1B55F2F.jpeg)
Every manufacturer uses different parts and controls them differently, due to this you cant just change out a couple of parts and make it work, nor would you want to, as an autopilot is a complete system designed to work with known parts tested for a specific airframe. As others have mentioned, if you stay within the same manufacturer there is a posibility to upgrade your system while using some of the existing parts.