Looking at possible PS3 engine purchase. Running TIU version 3.1x software. Would I need to upgrade to 4.x to gain features (quill whistle if so equipped, etc) that PS3 has or will 3.1x run PS3 as is. Most of my operating is startup, run, ring bell, blow whistle, shut down. Don't fool with all the "bells and whistle" stuff (lash ups, announcements, programming stops, doppler effects etc) that remote has, so I think I answered my own question, but just checking.
If I need to upgrade I will ship it back to MTH, as I don't have the equipment to do this and unaware of any eastern Iowa dealers so equipped.
