I have been fabbing whatever I needed for about the last 30 years or so. I am about to set up an assembly project to build half a dozen portable shooting benches. I am planning tripods with adjustable legs for leveling, a round post main frame, swiveling seats with adjustment for height and swivelling tops with a cut out. The frame will be steel and the top 5/4 or 1.5 inches of plywood and laminate. My main uses will be for our setups for fun longer range shooting(200-1000yard) at our farms. We will set them and targets up for the day and then remove them at the end of the day or weekend. We will also use them for prairie dog hunting. I am making them for a friend and family. We will use hunting rifles as well as target rifles. The point of this querry is, what size of top do you prefer and if you could change anything on yours what would you do differently?