Powerdyne does have unit(s)
From 10Q "The Company has recently completed a fully operational factory Series 2 prototype"
Also "The Company plans to install and maintain, own and operate electrical power generation equipment ("gensets") intended to be installed at a client location"
Custom build =$$$$, install=$$$$, own and operate=$$$$.
How is lack of revenue unproven? It works the other way, right?
They have one demonstration unit as of Sept. 30.
Looks like a deep hole from here.