I tend to prefer size 2-3mm which is pretty well near scale, but if not glued down can be a pain and with ally track you will likely need loose ballast. Alpine grit is an option at around 5-8mm in size.I live in a "farmers village/country side" They have a lot, but now the right one.....witch one...
Apparently, most American Death Row unfortunates choose cheese burger and chips for their last meal. Do they actually think that things can't get any worse than eating cheese burgers and chips?How can you experiment alot prior to execution when you only get to choose one meal?
I have created a chard with a temperature scale with the required gap distance.It is important to leave gaps at rail joints for expansion and contraction.