Modular Fantasy-Railcar for 2G/G/or LGB

Hello folks! i had created this Modular Railcar for my dad. i tried to make it as printable as posible on my 20x20cm anycubic. (but at the moment it prints nothing but lump) and i didnt have the patience for such big prints the size is nearly this of some LGB locomotivs. you can make it as short or long as you want. it is designt so, that in the floor is a space fot electrics and motors. the formely created wheel achsis i had delete cause i dont know how the have to be connected and there are many versions of bogies.

actualy i had not made an interior yet

Update: i addet a two seat chair with detouched stand for easier printing. for the opposite bench just mirroring the stand