I also assumed the plastic bushings and small snap bushing for the wires would be in bag 2670. They are not. I broke one of the old pivot bushings trying to get it out of the old tray so had to send off another order to Van's for small parts.
Here's a couple of other tips.
Someone mentioned reusing those U shaped reinforcements used on the old servo. They won't fit the new servo. The new servo is quite a bit larger.
You can reuse 4 of the old screws to mount the servo but they are a little long. I don't think that matters.
I used this wire diagram from the iS wire diagrams to organize the wiring.

My older airplane harness and old servo wiring had two white wires for UP and DN power and the latest harnesses have a white and black so you can't get the UP/DN wires backwards. The newer airplane harness also has the D-sub male connector already on the airplane harness. Those of us with the old harness have to install the male D-sub pins.

I crimp them (see Stein videos) although I guess you can solder them as well.
I seem to remember from the Dynon auto-trim setup with the AP-knobs panel you could switch this function in the software if you got them backwards. I could be wrong on that. I didn't get that far today since I quit to order the pivot bushings.
I did temporarily hook up the servo motor to see if the cockpit switch would run the servo and if the trim widget on the EMS would track it.
Everything seems to be working, just need to do the trim calibration when I get those pivot bushings and put everything back together.
Yeah, not knowing what was going to be in the 2670 bag and then researching the parts and wiring diagrams was a pain. There were 3 different connector styles used on the trim servo wiring over the years, spades, molex, and D-sub.
Ray Allen was a pleasure to work with. The new servo is shipped quickly. The cost will be the $90, but you pay $219 until you return the old servo for the core charge credit. My old servo is already on the way.
