John,
the mystery is why not just use the PS32 board and drop it into the tender and leave everything else alone
Possibly just due to simple inexperience.
Barry, you're probably right. I guess I can't fault him too much for that, all of us started at the same place, zero. 
I try to leave all my screwups behind me out of sight. 
A couple of follow up questions,
When performing an upgrade from P2 to P3 (kit or P2/3 board) are there any special steps that need to be taken to ensure that the measured loco speed is accurate? Is there an algorithm in the sound file?
And, when upgrading F-3AA diesels from P2 to P3 using an upgrade kit, I recall reading that MTH recommends installing two kits, one in each powered A unit ($$$$$s). Does the P2/3 upgrade path only require a change only to the primary A unit?
Thanks,
Tom
