Um... that might be a tad beyond my ability. LOL
I think i will keep it a 0-4-0 saddle tank but will make the power pickup and chassis a bit more reliable. Also maybe add some detailing to the body as well as add some sound and maybe a good smoke unit. Internal space is going to be a challenge.
Currently the axles do not sit level or parallel to each other and the wheel spacing is off to the point where the wheels fall inside the track. ( im thinking this is the old Lionel slipping "tire" issue )
Unsure about the goal for the passenger cars There is roof damage that needs to be repaired and i am considering upgrading the lighting to LED.