"Its a practice that should have disappeared before leaded/regular gas."

Newer is not always the only way. The disconect trial has worked for a long time with no problems. I'm not saying your method is wrong but don't discount the old way either. Both work and I don't see one being any better than the other. The statement the "the spike didn't show any immediate damage but who konws what damage down the road" doesn't hold water. If it is going to cause damage it would do it right now not later. So I say let's just agree to do it our own way and go from there. I will continue to suggest the disconnect way and you can recomend your way.