Hi, my first post. I have a D180 and no HS34. I need to upgrade my radio to 8.33 soon and I'm thinking of changing my SL40 to the GNC 255 navcom. Would this connect ok to the D180 and what sort of functionality will it give me in regard to VOR/LOC and glide slope. Will the OBS on the 255 control the selection of radials. Thanks for any help.