Larry I think you are over thinking this. Find what works best for you and go with that and from your post it appears that you have already done that. If that works best for you then that's what you go with. Personally I choose to lay the shirt on top of the platen when pressing only because I am too lazy to drape it over the bottom platen. In almost 5 years, I have tested every type of heat transfer paper and vinyl and I find that it really doesn't matter. The only time that I will slip the tee over the bottom platen is when I am doing sublimation and that is because of dye migration. Other than that it really has no effect one way of the other.