Salute to u Jmac...
Really agree wif u both smaller tyre in some case hv better grip than wider. I heard it b4 but nvr figure it out y.

As for the lower arm,i must check to double confirm.

Yes,i did cut the S14 rear spring to lower the height as i use pillowball mount too. The spring hv slightly bigger coils n it fit juz nice but still need to wired it. But i think the shock's oil were still stiff enough(not too stiff).
I will try to use KYB gas shock later n c how does it works.

As for tyre pressure,i found out lately std 1200 were oni approx 25psi. Usually i pumped around 32psi frt n 36psi rear.
But i decrease it now to 30psi frt n 33psi rear as b110 r quite light. Wat tyre pressure u reco?