The zero-crossing and AC switching circuit is tested and working. Next test is PWM. Those 6x10K resistors are supposed to be 2x33K. Didn't have any 33K half watt resistors. Therefore circuit will be smaller.

Please don't build and test a circuit like this unless you know how to do so safely. This circuit contains no transformer and is therefore un-isolated and should be treated, when powered, as all parts of the circuit are at mains voltage. I shouldn't have to say that 240V AC is HIGHLY DANGEROUS. If you attempt to measure this circuit with un-isolated lab equipment, you could potentially destroy your equipment and or yourself.