Thank you, AmFlyer, for helping me realize that individual uncoupling devices are still necessary to achieve realistic yard operations. I guess I'll just have to bite the proverbial bullet and incorporate them in my planned layout.
Do the S Helper Service/MTH uncoupling sections you are using on your fine-looking layout provide reliable operation- -that is, do they always disengage couplers properly when activated...or do you occasionally have to do that manually [with a stick, for instance]?