
Now that my son Michael and I have thoroughly tested the thwart boards and determined the best positioning for the seat on the thwart board, I removed it's clamp-style seat base (shown in the above photo) and installed a post-style base instead, which provides far greater stability and will allow the seat to swivel a full 360 degrees:

A 3/4" hole is drilled through the thwart board and a series of holes can also be drilled to allow the user the ability and luxury to position the seat to their liking (I've intentionality offset the hole on this board to allow the user the ability to cast to their right when need be for loch-style fishing):

Here's a shot of the finished product, which stays firmly in place or can be removed and the seat readjusted in less than 5 seconds:


I chose to use this design, as it allows me to simply pop the seat off the thwart boards and into the bases and pedestals that I've installed on the seat benches and floor boards:

I chose to go with 13" posts, as I feel that the boat would be less stable (lower center of gravity) and looks less like a "bass boat", as the seats barely sit above the gunnels:

I went with a mix of threaded and non-threaded bases, based on the fact that the shorter non-threaded posts (ones that I've cut and modified to my liking) are easier and quicker to swap in and out, as I prefer to place the seats directly on the seat mounts (without posts), as it's much safer and recommended when motoring at speeds over 5 mph or in rough water...
The threaded posts are over an inch longer than the non-threaded ones, so I chose to use the non-threaded bases in locations where there was enough clearance between the floor boards and the hull of the boat (everywhere but the center floor boards). I feel that the threaded bases provide a bit more stability for the post - due to the extra length of the shaft that extends below the base.


I measured, drilled and mounted a total of 4 pin-style seat bases down the center-line of the boat, which allows me to reconfigure the seating arrangement to accommodate up to 3 fly fishers or switch to a 2 person seating arrangement that will position the 2 anglers a nearly 10 feet apart, or position 3 anglers at a still fairly comfortable distance of 5 feet apart while using the posts and pedestals:


I just need to pick up some stainless hardware to complete the installation...
