Thoughts on the "tender powered" engines.

Speaking of the drive unit document, it's still missing all the last trains I confirmed (with help from Ucwepn and Wasinojinsei's videos). A propulsion method document would be somewhat redundant if you were to add notes to the respective engines in their DU entries (i.e., "Hank (HiT, in tender)" and "Hank (Fisher Price, in loco)").