The schematic I posted is missing the 100 ohm gate stopper for the FET in the CCS. It can clearly be seen in Sonic's photos. Be sure to put that in, it is required. It also helps construction a lot. 100R between CCS and cathode node is not needed. A resistor is a good binding post, but maybe get a 1R resistor for that. Or 10 or something. In some circuits you need a cathode stopper between cathode and CCS to prevent oscillations.