The PCB mod (SSOP version) is completed.
I'll upload modified BOM and Kicad files to the Github (probably tomorrow, I want to check it one more time, it's late here and BOM isn't ready).
As of now, the mod is UNTESTED! I've ordered all the components needed (from Mouser), but I'm now looking for some cheap PCB fab. Here, one 4 layer PCB costs about 120€ with shipping, which I'm not willing to pay (I can't afford it to be honest). So if anyone knows some cheap PCB fab in EU, let me know. Otherwise, I'll have to order it from US.
And the mod is still using IR3895, so the board will be probably about 4 times faster than the original one.