In regards to the building berms, since I am usually the only person riding my personal track I found that the track would develop one rut throughout the whole course and through the corners, so every few weeks I take the loader out there and smooth the single berm that was been created and spread this dirt all over the corner, this helps to make the corners very loamy as well as helping multiple lines to develop throughout the corner and the course. Also, after I have done this for the past few years, each time I do this I end up with more sand in the corner, by now each corner has a solid 8 inches of sand.