I see that Doorman now sells the TPSM's and reprogrammer for around $400.00. Has anyone had any experience with this new unit ? I'm looking to rid my dash of that annoying warning light as soon as I install two new 285/35/19"s in the rear. I'd like to replace all four sensors at the same time but I'm not looking forward to the aggravation of finding someone to program the TPSM system.