I am 6'6" tall and need more room on my 1800. I am considering having an upholsterer move me back as much as possible using the stock seat. I also want a backrest. Will this seat mod mess up installing a backrest such as the Utopia? If there is a conflict, would a simple mod to a bracket work? Those who have installed one of these may have a good idea what I am up against. Thanks for your help. I am trying to avoid a $1,700.00 custom seat. My stock seat is heated.