I am working on computer models based off of the Bachmann On30 coaches.
I've only ridden in one coach from the 19th century at Tweetsie, during the ET&WNC HS Convention. I wish I had paid more attention to the seating in EBT Coach #% because it was unbalanced. 2 seats on side for some way then switched to one seaters part way down the coach. This was on both sides.