Tom Collins, a 49-year-old data technician and father of seven, announced Monday that model railroading is a harsh mistress. 'Model railroading, like the Sea, can be a kind lady, but make no mistake, she can also be a cold and angry harpy,' Collins said. 'In times of yore, men tested their mettle against the Sea, but in these modern times, a man proves his virility one way only: building, maintaining and running a model-railroad set-up in his garage or den.' Collins advised using Testor's-brand epoxy glue for miniature trees and letting them dry for at least 24 hours. 