AXYS RMK, What's the difference between model years 16 to 17 and 17 to 18?

16 to 17 not much except black a-arms and new mapping, 17 to 18 new head, new ecu, new thermostat, new egt sensor (new pipe), new shock valving

17s come with the Message Center gauge, slightly larger than 16s, has scrolling messages.

Those new 2018 updates include:
800 H.O. Cleanfire Engine Update
New thermostat provides:
- Lower operating temperature, 110 degrees F (43.3º C) vs. 125 degrees F (51.6º C) for improved overheat margin and more consistent engine operation.
- Increases main circuit flow by 12 percent; increases bypass flow 9 percent.
- New thermostat will come on all 2018 snowmobiles with the 800 H.O. Cleanfire engine.
More durable exhaust gas temp sensor (EGT) providing more than 200 percent life improvement:
- Improved connector
- More durable sensing element
- Matched to new ECU
Sealed cross-shaft cavity crankcases provide additional lubrication and increased durability on both 600 and 800 H.O. Cleanfire engines.
Improved MAG end seal provides better sealing and increased durability on both 600 and 800 H.O.
RMK Monotube Shock Updates
MY18 RMK Monotube Shocks will feature all new valving with “Hi Flow” Walker Evans pistons on the front suspension and rear track shock that delivers less bottoming in the big bumps while maintaining a supple feel on the trail.

I am doing some electrical stuff on the new 18 in our stable and there are some wiring harness changes from the 16 diags that I have and the 18 and I am having problems finding (1) a wiring diagram/s and (2) as there some changes for this new sled, well can anyone help here? Dealer has been helpful but I jsue need to find detailed diagrams!
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