Don't sell it it has a very high value for any modeler who was in business back in the 70ies.I did convert mine to 2,4 tonight I could not resist it. It works !!!I used an FRSKY module but I am planning to replace it with a Jeti Duplex soon.I have very little knowledge of electronics but I will do it just to revive the old good days.I do not want to alter the TX so I will have to be creative.
Regards and thanks again
Nick