About 18 months ago, at the Great British Train Show in Brampton ON (next show is April 2020), I had 3 kits thrust into my hands.  I was taken aback because the donor didn't want anything for them.  So I took them home.  In the intervening time, I had a look in the boxes and did what I always do, even for modern kits, I bought in parts that I felt would be better than those supplied.  These include wheels (those supplied were horrible brass coarse gauge things) . buffers and vacuum pipes.