Rough Idle, 1800 clipper carbed

Hi there ive been using the search but nothing quite fits

My clipper carb, 1800cc has been idling rough lately, around 4-500rpm, occasionally even cuts out.

Is it a case of needing to clean idle jet or adjust idle screw? if there is one? if so where?

The fuel system is clean upto the filter anyway and all electrics are newish

Car works fine past idle speed, and fine on startup so the cold start choke/valve is doing its job ok

rightio, found that my accel cable is stretched to hell, so the adjuster has no more slack

still cant find the idle mix screw on the pierburg, any idea?

have a look in the big block carb section, theres a pierburg 2e2 faq in there