I have a Sylvan deep V aluminum boat. I use the pvc mount which I made. It's positioned about two feet from the front of the boat on the port side. No problems viewing either side, including the rear of the boat. I bought a Ram mount which has worked out well. I've used it this way for a little over a year. I may shorten the length at the top as well as the control arm as they have gotten in the way at times when jig fishing.
I only fish the two best days of the year, when its raining and when its not!