Deep breath :- I have taken note of Willbo's comments and gone down the Eastern Beaver route.
I have ordered
1. the PC8 Fuse Panel with built in (on) brake light switching lead and
2. Dual Headlight relays.
Cost so far : £127.00.
Rational:
I am a fiddler and something of a bodger, but I have a new bike so it's probably not the time for ham fisted over crimped, over soldered, crazy wiring that results in a 'smoulder'.
I take GW's advice on flexing soldered joints and Jeff999's crimp, solder, heat shrink. Hmmm I wondered why previous soldered joints always seemed to be too fragile.
Thanks to all for your comments and advice.
I'll update this as things progress.
So far the list of accessories to be powered has modified to:
Sat Nav
Phone charging via cigar lighter
Dual Horns (switching relay)
PD Oiler
Optimate charger
May also run a 2nd Cigar lighter / Aux socket in the under the seat tray to charge Ipod / phone from an always on feed so I can leave it parked and charge what I need.
D