Dear HenryIt's seems that our pHmeter PCB is now readyplease find enclosed the the last gerbert file.for the components the value off one resistance remain to be defited and I will send you the last complet list for fabrication.I d'ont think that will change any thing in your last cotationnow please , it will be necessary to get from you samples off the PCB before fabrication.for controlPlease advisebest regards jacques