Ya the "oor" coil is a must have on the CoRe. But ya gotta remember this is a no-frills machine ( no iron audio or tone breaks etc) Put her in 3 tone set the ID Mask fairly low and separate the good stuff outta the bad It will take a few hours to get used to but once you do, It will be a machine that stays around.

Nokta CoRe & Relic
Makro Racer & Racer 2
MXT & M6