@kopca
My recollection is that all of Dezl, RV & Camper 760 are the same PCB P/N as is also nuvi 2797, however you should confirm that information. For Camper 770 and 780 to Dezl you need to research the PCB P/Ns of both the donor firmware and recipient hardware to ensure compatibility starting with PCB P/Ns. Marching PCB P/Ns doesn't absolutely guarantee 100% successful cross-flashing but non-matching ones are not compatible.