Hello all, I’ve searched for di2 info and started a few threads of my own but you have to do a lot of digging to find what you’re looking for, so I thought I would start this post with a few things I’ve learned and hopefully some of you guru’s can add your knowledge here. I can’t take credit for all of this as much of what I’ll add came from others.

Re-center front derailleur.
I moved my di2 from my old frame to my new, the front derailleur trim was all the way inboard as far as it would go and I still needed a couple more steps.
-What I did:
1 placed it in big ring/big cog, then went to trim mode and went outboard 12 steps on the front der to get it back to center.
2 cancelled trim mode.
3 went to big ring/little cog and adjusted the high.
4 went to little ring/big cog and adjusted the low.
5 went to big ring/big cog, then back to trim mode, then adjusted inboard a couple steps. This was my original problem it was pegged out inboard and I needed a couple more steps to prevent rubbing (even though I rarely use this combo)

- the Shimano tool you might need to insert or remove your cables is Shimano TL-EW01 Di2 Wiring Plug Tool. I’ve done it with needle nose pliers but they suggest using this tool. When inserting make sure you push until you feel a “click”.

- if you install yourself something I’ve learned is you don’t have to connect your cables to your J box or A box in any certain order, just shove them into whatever port you want and the system will figure it all out.

- Park tool makes a nifty little tool set you can buy that makes running cables much easier. It’s a little pricey but if you’re gonna do it more than once it might be worth it. You can find it here

One more thing I thought I would add is when researching this I found that you don’t have to have e-tube to put your bike into synchronized shifting mode. You can do it by pressing the button on the bottom of the A box. Press twice and the lights come on steady, this means you’re in manual mode. Quickly double press again and the lights blink twice telling you you’re now in semi synchro mode. Press twice again and the lights blink 3 times, now you’re in full synchro. I tested it and it works.

Some helpful links:
Shimano e-tube manual pdf
A good Di2 installation article
Di2 crash recovery mode
Ultegra 8050 di2 manual pdf
A thread about rear derailleur di2
Shimano tech doc search
Ultegra 6870 di2 manual pdf

I’ll add more as I discover them but if anybody has some wisdom or articles to share please do.