Ma'am, reach out to me. I have units, parts and the warranty/service network on hand.... as I am the Flag Ship Dealer for Goodsense. We have a dedicated brand manager that can proficiently educate you on the various options that Goodsense offer. From high end trim options such as GM, Cummins and Cascade down to the grey market options some suppliers elect run (as mentioned by another poster). If you want professional insight, contact me directly. My email can be found in my profile, oe simply send me your contact. I send Goodsense products all the time out of the port of Miami.

Some thing to note: I deal in all product lines, I feel I have a solid basis for my opinion on the majority of machinery on the market.