Most of our products, including the Mastermind are made in the USA. Some manufacturing runs of some products were built either in part or entirely in Mexico, but everything is being transitioned to the USA (definitely going against the trend here!), with the transition complete in a month or so. The only things that are made in China are the molded cable assemblies: the 7 pin MIDI cable and the 4x 1/4" adapter cable. We'd have to triple the price of those cables to build them here. Most of our electronic components are manufactured overseas, but that's unavoidable these days.
The Mastermind production had some major delays, mostly due to our move to a new manufacturer plus some parts availability problems. We haven't changed the design of the Mastermind.The good news is that the first units of the new production shipped from our office yesterday, so all the back orders should be filled in a week or so. We test every unit that comes out of manufacturing and the quality of the work coming out of the new manufacturer is just fantastic - better than we've ever seen!
Yes, you can use the Rocktron 5-to-7 MIDI cable, no problem.