I find that most highseats are fairly generic,and it's pretty much one size fits all.
I came up with a different design were you don't have the vertical upright section's level with the front of the seat. Which means you could swing round all the way to your right or left because there's no uprights in the way of your legs. Also,the ability to change the high of the front rail for different heights of stalker very quickly without tools. I did pitch it at one high seat maker,but they were happy churning out bog standard high seats. I think they've missed a trick. As regards shooting from a highseat,the main thing I do when I get it one is try out how I'm going to take a shot from whichever way a deer might come out before the event arises. Then you know what to do when the time comes without getting into a panic. Personally,I have no problem with resting my rifle directly on the front or side rails a long as it feels stable. It's definitely better with some sort of cushioning from a stability point,and reduces clanging and banging. Practice is the best way to gain confidence from a highseat,or any other position you make have to take a shot.