I just just registered to share my results and imo it’s totally worth doing this mod.
I added a switch to change between c29 fwd only + 10k res on r97 and c29 fwd & 30k res + 10k trimpot on r97 (to compensate lower resonance).
The difference is pretty subtle but noticeable. Accent becomes slightly softer, more fluent like in original 303.
Also Envelope mod becomes slightly greasier like in original 303.
Generally x0xb0x’s sequencer sounded more stiff to me imo but thanks to this mod it feels a little groovier and closer to original 303 now.