You should be able to read bottom at any speed. My lowrance will read bottom at 50 MPH when set up correctly. The linked article has a bunch of information that can help you. Without looking at your transducer placement it is impossible to tell what is wrong with yours. http://www.sternmate.com/Where.html
Get the itroll, its infinitely adjustable as compared to the trollmaster. The hunt mode works well but is not adjustable on the fly while you are using it. You have to set the parameters up on hunt mode and then turn it on and hope they are right for the speeds you want. If you want or need to change them you have to get out of hunt mode and re enter what you want. If it was adjustable on the fly I would have paid extra for it after the free trial period. The basic throttle control and other features work great on my Yamaha 9.9 kicker.
Single. The base is adjustable about 45 degrees with those. I have two on each side for my dipsey rods, one facing straight out the other set at 45 degrees pointed back towards the rear, that way it keeps the rod tips away from each other.
I have 6 of the cannons and you can grab the holder and release lever at the same time and adjust it up or down with one hand. I also have a traxtech for my chute rod and you have to pull up on the lever with one hand and grab the rod holder with the other to move it up or down. I prefer the cannons after using both. Both of the them ratchet up when you grab the rod and both are the same quality IMO.
I have traxtech tracks on mine and just measured the bases for my great lakes systems rod trees. The bottom plate that goes in the track is 5" long by 2-15/16" wide. The top plate that rides on the track is 5"wide x 3-3/8" wide.
I remove the front hook on all my walleye cranks and also change out the rear hook to a size 2. I'm sure it changes the action somewhat but the walleye don't seem to care.
I have run 2 of these the last two years with no problems whatsoever. If you are used to running the older style cannons you will be shocked as to how fast these newer ones are. I use 12lb and 14lb weights with mine.
I have 8 of the Okuma Dead Eye open water trolling rods that I use as board/leadcore rods. I have the 8'6" telescoping model that's breaks down to 7' which is great for storage. The action is perfect for running inline boards.
https://www.fishusa.com/product/Okuma-Dead-Eye-Trolling-Rods
Your right, poor choice of words on my part so i changed my previous post to reflect that. Thank you for your in depth explanation of the difference between the two, something I was too lazy to type out.
I put on a small amount of mono on the convectors so that the wire doesn't slip on the reel, about 30 ft or so. My Tekotas have a small stud on the spool so there is no need for mono on those.
The weighted steel is similar (certainly not equivalent) to copper that most people use. The 19 strand wire is the backing. There are several YouTube videos that show some of the benefits of using it compared to regular copper.
I really like the versatility to be able to cover the water column with one rod. It works really well on walleye on Erie in the summer when the walleye are deep. I ended up rigging another identical rod recently because it worked so well.