The proof is in the pudding!!
I have now made 5 of the decade resistor boxes and I have to say the consistency of the work by PCBWay is fantastic.
They are all amazingly in spec so props to the PCBWay SMD assembly service!
I made one small error in that 1 of the locking holes for the switches had a slightly lower Y position.
Once this is corrected I will share the project in the PCBWay community.
I will also make the gerbers available so that you can choose the 0805 resistors of your choice.
I am all set now to make an opamp demo to demonstrate how to scale and bias a signal to be safe for a microprocessor input. (and also hopefully how to scale a VU meter for @frequencymanipulator )