Active Load Potentiometer

[Havenwood]

Hi, I have this potentiometers, cheap and no high quality


What about use this potentiometer as active load in a preamplifier?

I use this circuit


And this is the semi-final circuit, PSpice simulation.
Use cascode in the gain stage.

THD > 0,2%, gain x2, Vout 1Vpp, no global feedback.

Then, I think use a buffer like Dispre I output stage, for example.
No OpAmp like buffer. With unit gain, we have NFB of 120dB (TL082), and I want to try make a preamplifier with no global feedback or very low global feedback.

Opinions? Suggestions? Others ideas?
Regards