I have a UP Turbine (Premier 3 Unit Big Blow) which was upgraded to PS2 (3 volt boards) which I would like to upgrade to PS3. This engine has two powered engines (Cab and Turbine unit) with the Turbine unit containing a slave board connected to the Cab with a tether.
My question is, can I upgrade the Cab only with the PS3 upgrade kit? Will the PS3 board set talk to the PS2 slave board set in the Turbine unit? Do I have to do 2 upgrades?