hoppers

Dunno if this is of use to anyone, but it's among the current load of pics I took in Barry in 1968. Perhaps the weathering on the wagons may be helpful? Brian

I have a Slaters 20T hopper wagon which I intend to convert to S7 (when I get the cast off my right hand in a few weeks) ans was wondering if anyone had done such a convert? Swapping over the wheels is straight forward but do I need compensation/springing? Remembering that the kit has a hopper...