Yep. That is the idea. To do away with the pole and going to the fore deck. On the Harbour the traffic is huge and single handed sailing could be dicey for the fast changing circumstances.
This set up is removed in seconds if tacking or gybing is necessary. It works well in winds from 120? to 240? and up to 15-18 knots when sheet tension becomes too high for comfortable operation.
I use the same set up with my huge reacher in lower winds up to 12-15 knots outside.
With the genoa in use the main could be scandalised if blanketed by the wind too much while running square.
I am running a normal genoa sheet, white sheet unused on the pic. When in use, run to the front cockpit winch.
The green spinnaker sheet with a snap shackle clipped to the loop of the genoa sheet at the clew, run back via the barber hauler, the thin sheet to the toe rail and is clipped to the boom bail and run back to the spinnaker winch.
The preventer is clipped to the boom bail by a snap shackle and lead via a turning block on the fore deck back to the halyard winch.
The whole web is dropped by un clipping the sheet from the boom bail. The preventer taken off the winch does not stop the boom being tacked. Un clip that later.

I hope, this helps.