With the original Spirit (red and black) units, you only have 6 power ports and 1 DSM/DSMX port. Due to the smaller foot print, these are great units for smaller helis and keep wiring neat. For larger helis, especially nitro which requires an additional servo (throttle servo), you will have no choice but to use Y-connectors to share the limited number of ports. In comparison, the slightly more expensive Spirit Pro units have 8 power ports and 2 DSM/DSMX ports, so you may end up not needing any Y-connectors at all. The slightly larger foot print of the Spirit Pro should not be an issue for a larger heli like a 600 nitro.

The receiver will draw only a fraction of the power compared to the 5 servos connected to the Spirit unit. The Align B6T 2 in 1 Voltage Regulator https://www.amainhobbies.com/align-b6t- ... h10/p18762 has only one single power output lead. You may be better off connecting this single power output lead to the Spirit unit and let the receiver be powered through the S-BUS adapter cable http://store.spirit-system.com/en/acces ... apter.html rather than your proposed connection of this single power lead to the receiver which condemns the Spirit unit and all 5 servos to receive power from the receiver via the S-BUS cable.