The engine's on these are very nice, I was super impressed with mine.
Not so sure about the two boiler ends not being soldered in though and just held in place and made waterproof
by the internal brass stay and two large 'O' rings on each boiler end.
Mines had a workout from my grandson and its stood up to that well, but I think when I get some time I'll solder the ends in.
I have also ordered one of these brass switches to see if it will fit, not a fan of the dinky plastic switch as I feel it takes away from
what is a really nice looking steam plant -
https://www.ebay.com.au/itm/364585347202Charlie has been a wonderful friend to you Travis.