David Johnson wrote in message <3677A0D3.D468217F@ozemail.com.au>... >Yep. The cable for the lower train would either slice the upper train in half, >or knock it off the track. When the scenic railway is running, the cable can be >very high up in the air due to changes in gradient. > Ouch! I wonder if that problem could be solved somehow? Can't think how, offhand. David Martin