I installed a Lowrance Elite 7 Ti2 on my 2019 Outback tonight. I have the 3 in 1 transducer ... the one that looks like a giant hot dog. Here's a few things I learned along the way:
1. The transducer mounts easily and securely to the Guardian plate. It's a very clean installation; with the Hobie-supplied fairing plate, it looks like it belongs there.
2. Tying the Guardian plate bridle to the cockpit transducer cord is a PITA and best done with an assistant. You have to tie the knot high enough so that the transducer is fully retracted when you pull the cord from the cockpit. A little trial and error is all it takes and two pairs of hands makes it easier.
3. The small sheet metal screws holding the cable/hull access plug above the transducer are easy to drop in the hull

4. There's a ton of extra transducer cable. You'll want to coil it up, zip tie it, and stow it in the hull.
5. The power cable is much shorter. If you use the Hobie battery holder like I did and zip tie the connections up high so they're not flopping around, you'll have just enough to make it to the head unit when mounted in the rear-most end of the track. If you want to move the FF up towards the bow, you might need an extension cable.
6. The 10ah Nocqua lithium battery fits in exactly one-half of the Hobie battery holder.
7. Don't be surprised when your touchscreen doesn't work after installation. The transducer needs to be in the water to close a ground loop. Here's a good Lowrance video on this subject:
https://www.youtube.com/watch?v=knlUP4ckLu8. I wish I had seen this before spending an hour cussing out my touchscreen after installation.
8. Hobie's installation video was very helpful. I recommend you watch it prior to doing your own install.
9. YakAttack makes a more robust mounting solution than the Ram ball mount. Both offer a Lowrance-compatible mount.
10. The head unit ships with a hard plastic, removable Lowrance branded cover. It provides substantial screen protection for storage. Most online listings for the Ti2 don't mention the cover and I almost ordered one from Lowrance.