Indoc, systems and ground is all held at Envoy's training center in DFW, regardless of a/c type. Sims are then held at various locations around the country depending on your aircraft.
They are building a break in between indoc and systems/sim. Many moons ago the break was between finishing your oral and the sim. A month off during that time frame allowed a lot of rust to accumulate. I'm glad they have changed where the gap is.