Fender Reverb Transformer Dumbleator Grounding

[Matt D]

I building a Dumbleator using Structo's schematic based around the Fender reverb power transformer. My question is: Should I ground the nodes of the power supply separately (one at the preamp ground and one at the main ground), use one star ground for the power supply and preamp, or ground the power and preamp sections separately in two nodes?