MHP Common Sense Mod for TS9 , any idea?

[nooneknows]

Hi,
don't want to infrange any copyright, but I'm curious about the mhp Common Sense mod many users say are the best in terms of transparency and wider mid hump for the TS9, I haven't found anything, except it does not involve mojo component mods, but that's really vague.

I think it might be something about quality cap, maybe a slightly larger cap on the op amp feedbacke and, maybe, a cap mod on the filter at the output of the opamp to get a wider band but it's just spculation.

they're not expensive but, being oversea, it would be impossible to obtain at a fair price here in Europe, so, any idea about it?