troy: i bought 1 that came from a place in califoria, hemispherical products, i believe, and it needed tweeking to be correct.(i wasn't the orginal buyer). i thought i was ahead in the game because i found the k and i bought 1 of the plastic blocks to trial fit everything. lucky for me i decided to install the real block before i decided i was finished because i had to tweek it somemore! i will take some pics and pm them to you later today. my advise on your project is measure, measure, and measure again and then double check every thing again to make sure your right!!!lol dave