There's a whole ton of X300 experts in Horicon, less than 50 miles ENE of Madison. Probably about the same distance east of you, LOL. That's where the X300 is built.
What kind of "upgrades" do you have in mind? Plenty of people here that own X3's, and lots more that have help to offer.
What kind of "upgrades" do you have in mind? Plenty of people here that own X3's, and lots more that have help to offer.