I did revert back to using the R6S - R2, Astras, Cube, T3, TOBS Lavender, Alum and balm for today's shave but adjusted my technique using advice received in another thread.
My understanding this far, is that good technique is:
Learning to hold the razor at the correct angle while applying the least amount of pressure, to enable efficient hair removal and eliminate sore skin.
By reducing the amount of pressure to where I could barely feel the razor, I found I was listening to the sound of the hairs being cut which in turn led to a closer shave, including the left side of my neck, an area I had previously stuggled with.