Edlbrk performer carb 1806

[veltex]

Can anyone tell me what is the "low speed circuit" ? how do I get at it and clean it (it is the last thing on Edelbrocks troubleshoot list that I havent done for mid throttle pinging), also can anyone check there performer w/electric choke and see if there is a small hole sucking air just under and to front of choke housing, the hole is facing straight sideways toward passeger side fender? thanks in advance