I don't know if I have entered this forum properly..but time will tell. Could someone please advise me on the ply thickness for a hornby OO gauge model train starter kit. This train is for my 7 year old grandson...he was so excited to get this train....but I thought it could be left under his bed on the plastic trackmat....big mistake....track is broken with bent points and connections now not connecting. Have spoken to a couple of model train retailers...they said 15 mil plyboard with 12 mil nails...but I feel that will be too heavy for him to pull out from under his bed...there is very limited space in their house. Maybe 9 mil could be lighter but is it strong enough to not bend and twist and nails are too long....could someone please advise me...it would be much appreciated.