VPI Scoutmaster static

I´ve been having problems with static (seem to turn into loud static shocks - only in one channel - when touching anything metallic on my TT; CD player work fine, so it shouldn´t be the speakers or amp) with my VPI Scoutmaster for weeks now, but have not figured out what it really causes and what could I do about it. Bought today zerostat 3 (will arrive in couple of days I hope), I cleaned my TT platter with the help of clearaudio anti static liquid (and also surroundings of my TT), grounded the cable to preamp earth. is there´s anything else I could do? i suppose it´s the best place to ask for advice.

my vinyl system is VPI Scoutmaster (TNT feet, periphery ring and HRX center), Graham Slee Reflex Gold preamp, Sumiko Blackbird (Harmonic Tech and AU24 cables + Audio Analogue integrated amp + Dynaudio Audience 72 speakers) and all sitting on a solid oak rack (on linoleum floor).

Apologies for my English (I´m no native speaker) and if it sounds stupid, i´m just out of ideas and advice is much appreciated.