Basically, grading posts are only visible to the OP, hidden from anyone offering their grade to avoid any influence, bias. The OP can choose to show once satisfied.
Also, UI features like check boxes or drop down menus for grading; "Mint 9.4",..etc. and text boxes for other pertinent details/info to assit the OP. This would be more simplified and easier to see results. OP could see a run down of grades and an avg.