I like Atlas code 55 because it looks great, however I will need to change wheels on some rolling stock, with the cars thats no problem but what do I do with the locomotives that touch the ties, can I replace the wheels or is it complicated.
Jan, it would help if you would let us know what locos you are concerned about. NWSL sells replacement wheels for quite a few diesels and there are a couple of cottage industries that do loco mods. Personally, the only ones I've had trouble with are the old Lifelike diesels (for which NWSL has replacements), the ancient Atlas 4-6-2, and an old Bachmann Northern.
The Lifelike diesels are on the edge fl@tliner , I have some old Minitrix engines that are a real problem and seeing what kind of rail they are made for , I'd probably better sell them or place them on a passive piece of track as scenery.
Maybe I should know but what does NWSL stand for and do you have a website?
Let me warn you that their catalog(ue?) an be a little difficult to work with, but there are a lot of goodies hidden in there!
The Lifelike diesels I referred to were the old F7, GP38-2, and BL-2 models. I don't have experience with any others except the excellent SW-8.
Unless you have some emotional attachment to the old Trix locos, they would probably bring decent money on eBay, or such. I have several engines that I'm agonizing over DCC installation, as well as the flange issue. I think I'm going to have to model a scrap line...