None, I think the original schematic called for a 47nf cap into the feedback loop (overdrive section), but I upped this to 470 to drop the frequency of the HPF into the filth section, so it delivers full range overdrive instead of chopping off the bottom end.
The input cap has been increased too, for the same reason.
The EQ section has also been 'fettled' to increase the low end (this comes after the overdrive section)