Just wanted to clarify something as I have been having a few tuning issues wit GO-5R

On break in I added the extra shim for the whole break in and then removed it after around 10 - 12 tanks. I am now running on Bryons 25% fuel and last night at the track I had a decent tune using the settings from GO NZ website of 1.25 - 1.50 turns in from flush on the LSN and a few mins turn on HSN needle from flush. The car was running great after a few laps but seemed a little slow on take off on the bottom end so I leaned a little bit more and then it was just so rich and wouldnt hold the idle. I moved the lsn back to what I had before the break and it was same Would the cause of this be anthing to do with my plug going off? I did get a shunt from behind which caused my servo to jump a cog.