Apologies that this has been addressed before but I want to make sure I get it right!
I have a conventional Lionel SD70 (6-18264, I think) with signal sounds board and 104E unit. Partly as an exercise and partly as the loco means a lot to me I want to upgrade it to Railsounds and TMCC.
I assume I need the Railsounds board form ERR and what else ? - the Cruise Commander 4.1 kit? (not the M version as there are no TMCC components in the loco at the loco at the moment ?) Are there any other options ?
Thanks