it looks like i found the answer to my own question. by googleing st10 i found some new to me pics that i hadn't seen yet. i knew the grills were different from the st16's and such, but as it turns out it seems that the rt10/st10 doesn't use a spacer or bracket between the frame and the lower grill at all. the cast for the grill incorporates mounting holes at the correct distance so it can be simply bolted to the frame. now the question is can i find a new proper one or make mine work some how. the busted off hinges on the top are giving me the most trouble. thanks guys