The PCBs IRF3205 Have Arrived

The PCBs have arrived back from Chiltern Circuits. There are 8 panels, each containing 28 printed circuit boards.
I’ve made a minor change to the circuit too. The IRFZ44N MOSFET has been replaced by an IRF3205. The new transistor has a lower ‘on resistance’ so a little less power is consumed within the device. The Z44N has an on resistance of 17 milliohms (0.017 ohms), but the 3205 is less than half that at just 8 milliohms (0.008 ohms).
The IRF3205 does have a correspondingly higher gate capacitance (about 3.2 nanofarads), so I’ve reduced the gate resistance from 10k ohms to 4k7. Tests confirm that this has little or no effect on the charge pump circuit – the gate voltage is still over 20 volts relative to ground.