Thanks Ken! This version of the trimmer uses a 13 horse engine I found for $70. Otherwise, everything else comes from pieces I had lying around or fashioned on the lathe. The original version used sickle cutters, but after 5 seasons the pitman arm drive for the top cutter finally did in the engine mount and cracked the crankcase of the gear-reduced 7 horse I was using (another cast-away engine I picked up and rebuilt). I knew that re-designing the trimmer this way would be much more dangerous, and yes, proper guards need to be built for it - though that will probably have to wait now until next spring. Dan.