Good to see you're actually tinkering, not only casting aspersions. I notice you can't quite stop criticizing, though. You need to work on that.
There are several ways to run this thing. The point is, however, to bring up the native nonlinearities of the JFET, not the clipping behaviour. Nor any attempt to fake a full waved rectifier. To that end, you want to keep the JFET in the square-law region, not overdriving it. The phase inverter and opposing JFETs are intended for this purpose.
I suppose I should start sifting through your stuff, looking for "mistakes" I would correct. That would be fun, wouldn't it?
Shall we? Er, I mean, do you need any help with your stuff? Maybe I can offer some technical advice.
