ERR Upgrade to MTH SD-35 PS-2 engine

Here was a retro fit of ERR and RS to a 3V PS-2 MTH engine.  To keep all features I had to convert the PS-2 smoke to PS-1, luckly I had a smoke unit instock that was a direct match to the PS-2 version.  Back fit PS-1 couplers, install a CV board to run the Number board, Interior, and marker lights, converted HL/RL to LED run off the Cruise CDR, and snuggle everything into the narrow body.  I converted the normal switch accessed through the roof to the smoke control and Run/Prg switch.  Still finishing it up,  but operational.  G