approaching retirement age but still working as a general contractor very familiar with finish carpentry, have great simple ideas on building trestles & bridges inexpensively, former RCA insitute student good knowledge of old electronics and former employee of Honeywell where I spent my life with relays, comes in handy to do many operations especially on my near 40 train and motorized unit layout, all run at the same time. If you have a particular question, I an help especially where to get the parts I use for animations that I build you can email me directly at ritchderus@aol.com anytime!