OK, this is what I did. I chucked the smallest carb insert (which I'll never use) into my lathe and turned out the inside on an angle to give it sort of a funnel shape. I put a roundish taper on the outside edge by hand while spinning it in the lathe. I then bead blasted the inside to take off any sharp microscopic edges that the machining process may have left. I then polished the inside using jeweler's rouge.

I then tuned it on the bottom end as it should be. Not too rich and not too lean. I tuned the top end a tad on the lean side. I usually like to run my engines fat, but for these testing purposes, I went a bit lean.

After testing it, I immediatedly pulled it out and went with one of the smaller inserts. With the modified one, things were just too loose. I could't control it for anything. If I started it and let it warm up, then stomped it from a dead, the buggy would spin. I don't mean that the wheels spin, the whole buggy did. For those of you that are older and liked the Sunday morning monster movies of 30 or so years ago, it reminded me of Gamera the flying turtle. In the dirt, it was just too touchy. Anything off of idle just produced too much power. Maybe it would have been better with some .9 or 1mm springs in the clutch (I'm running 1.1), but I didn't feel like pulling the engine to check it out.

I don't know. If you want insane, something like this may be for you, but it isn't practical. The runtime also took a nose dive.