Thank you again! You help me again to avoid bricking my nuvi 205. From what I understand, nuvi2x5_regionfileonly__510.gcd HwID851 should not be converted to HwID 1074 regardless RNG tool allow to do it, i.e., I won't be able to downgrade my nuvi 205 because files listed in this post are for HwID 851 and then not compatible with HwID1074.

Best Regards,