Hi, I was wondering if the 2019 Envoy model is an NXT or is the Envoy 2019 just Envoy 2019 and not Envoy NXT? Hope that makes sense lol. We bought a 2019 Highlife Envoy and when we opened the panel to get the serial number it says ENVOY NXT but does not show the year it was made. We want to be sure we received the correct 2019 Envoy hot tub. Any help would be appreciated!