My local club is having a clearout and they are disposing of an American based layout laid with code 55 track. It hasn't been used for several years so nobody could remember whether the rolling stock had wheels 'as fitted' or they had to go for fine scale. I have Proto 2000 locos and a variety of freight cars including some by IHC, Athearn and some older Bachmann. Will they be all right running on this code 55 track ? Its a nice layout, with the size and design I want but if I am going to have to take it all up to relay it with something heavier ie code 75 then I will have to think again. Any advice welcome.