I have decided to change the 27K resistor in the ZC circuit to a 15K due to a number of people having an issue with the 27K. The 15K appears to always work well.
The official resistor will be mouser # 660-CFS1/4CT52R153J
but basicly any 15k 1/4 watt that you can get at radio shack will be fine.
This change will be reflected in any new PCB's ordered for the FS as I will change the Silk to show a 15k.
The manual will be changed also to reflect this.
RJ