I know the blade topic has been driven in the ground lately, but I want to find out what people think is best. Are running double blades worth it? Or, should a person stick with running single blades? I did a search and some say doubles are the best way to go, while others say it is a waste of time and too hard on the machine, uses too much gas, etc. I would like to see some hardcore evidence on which is best. I have never used double blades, but am interested in trying it out. But, before I do, being relatively new at this, I would like to know from those who have been around for awhile and find out what has worked best for them. Let the debating begin.