so i wanna build a battleship type box for my yard just for some variety im thinking i would have each section of it be around 4 feet long and maybe like 3 feet tall at the highest, ive got about 30 feet of space between the bottom of my drop in and the fence so i dont think i could go much longer then this, does anyone have any ideas for the angle i should have the up and down parts meet the flat part at so that it wont be too steep but will still be fun?