the variacs work a treat but i wasnt sure about the wiring for the thermostat.
as for the fans, no buzzing whats so ever, the fan runs from as low as 20/100 power setting.
i did make the mistake of wiring the neutral & live on the wrong terminals but i soon sorted it.
know you werent knocking it, i was originally gonny get the primair but after all
the reports of them making fans hum/buzz, this was the better option. proper stealth
& thanks to all the kind folk for giving me some help with the build,
i couldnt have done it without your help, cheers JH
my next plan now is to make a single variac controller for the veg cab, itll just be 1 variac,
1 ip66 enclosure, 2 grommit glands & some 1.5mm 3 core cable for the power in & power out.