Looks like both of the upper switches are on one circuit board. Radio South has switches for sale if you want to DIY? It is an easy fix with the proper equipment.
Nice work, not easy to find and fix. Great that the two company’s worked together with you.Finally, after spending several weeks gathering and sifting through all the videos and data of troubleshooting random blue bird 51/52 series servo twitching caused by GP Ignitions... my video is live. Consulting with Joe Lewis at Aviator Plus and Corresponding with Blue Bird Mfgr in Taiwan (emails and several test servos) to eventually derive a solution. Mfgr dates in question 51/52 servos <10/2023 mfgr date, and late 2022-early 2023 GP ignitions. This has indeed been resolved by both manufactures at the factory level and appears to be isolated to the compatibility of these two products.
Looks like both of the upper switches are on one circuit board. Radio South has switches for sale if you want to DIY? It is an easy fix with the proper equipment.