I got the fever of HO a couple months ago buying a setup for my nephew's birthday.I have really gotten into repairing rolling stock and tring to repair locos,dsl's&steamers.is there something thats best for filling screw holes  for drilling out and running a new screw into especially for trucks that have been torn out.Ive tried silicone,epoxy of a couple types,and body putty,none really is right for the job. Thanks for any ideas!savage99