I don't know how it would do against coconuts, I've never really done that before.
I like them this way because they cut with less effort. I have back problems sometimes and I don't need to be wailing away at stuff around the yard. I believe that slow is smooth and smooth is fast. You'd be surprised how slowly I swing a knife when I'm working around the house, half the cut is in the wrist as if I were snapping a whip. These slow deliberate cuts don't beat up on a knife quite as bad as mindless thrashing so the knife can be thinner. And the thinner knife can make a cut with less motion. I'll shoot some video of cutting a bendy drinking straw and you'll get the idea. *BINK* two straws.
Anyways, I like these thin sharp knives. But, you can bend the bevel with a hard ill placed strike. Also, an edge at 15DPS will take much more damage than 20 DPS if you hit a piece of wire in a tree or clack it against a rock.
I got the term "racing knife" from Dan. He has thicker knives he lets students train with, but in a competition his racing knife is actually extremely thin. I would probably damage his competition knife in a 2X4 cut because my form isn't the cleanest, but he hits with a lot of control.
I'll include some dimensional numbers in the sale after I finish building them. I plan to sharpen them tomorrow.
The regular Light Chopper is already very thin. These "racing knives" are pushing the limit and are not general purpose and not for everybody.