Ok if there are any troll here is your chance, I just got the below bar made up and tested, works great for me. Feel free to make suggestions and improvements for what would better for you. The below proto bar was built from the many bar posts in the SB forum.
1) Optional Plastic inside line that is smooth and does not catch on the bar
2) Soft bar ends ( better for heads and surfboards )
3) Optional Protected center safety line that does not catch on the bar ( safety line that wear out suck )
4) Below bar push away release
5) Below bar swivel
6) No above bar swivel
7) 20m + 4m - 24m Lines best for most riders, I like 20m lines for surf.
8) Split close to bar V one line flagging not Y
9) Above bar de power clam cleat within reach that does not flap around.
10) Clean light and simple, no fluff... (KISS)
11) Short throw and long throw in the one bar with a simple quick adjustment
12) STRONG 450kg center lines and 350kg outer lines
13) Easy to replace parts. All parts of the bar are easily replaced using parts from local kite and marine shops.
14) Easy to detach lines
. All 4 lines can be easily detached without having to unthread 24m through a hoop. This makes changing lines, untangling, removing seaweed 1000 times faster and easier.
15) There will be a 5th line optional add-on, and a plastic protected center line addon.
16) Under $400 AUD