I have Mikes entire collection of books and DVD,S. I am not able to find dimensions or plans for the up hill patio as a reference. I am building an underground house strictly according to Mikes PSP. I want to also convert the up hill patio into a greenhouse. The space for the up hill patio measures 5 meters length and 3 meters width. What would be an acceptable rise and going for the up hill terrace considering I will be using these terrace steps to grow plants? I will be adding separate steps in the corner for human traffic. Any help would be appreciated.