next the LED indicators on the b33 plunger (similar tinware to earlier a10s)
same style indicators, got from AliExpress, black as they suited the bike better. to me they look like the old lucas indicator style on a65s etc tho smaller and more discrete. my flasher beeps (useless at speed) but ok at the lights and I can see the indicators as they are mounted high.
the front ones are mounted non-destructively like this: the indicators have a M10 female thread so I got some M10 threaded rod, drilled a hole for wires up the centre (and filed it oval for 2 wires) then turned down one end of the bar (i don't have a lathe so in the hand-drill and against the grinder
) then put a BSCy thread on one end, so it screws into the headdlamp shell nut and secured with a nut on the inside. advantages are no damage or change to the BSA and can be removed in 10 minutes. and looks good.
the rear indicators were easier as the tail lamp mounting unit is open so one bracket holds both indicators and secured to bike by number plate screws.
the switch unit was an experiment in mounting two 'old style' switches together as I ran out of room for two next to each other. it works ok but fiddly and I'm not recommending it. it could be its own thread on good ideas that aren't worth the effort.
I like LED indicators due to their low power use not loading up the dynamo. incandescent indicator bulbs can be over 20W each, then add a tail bulb and brake light (21+5w) and headlamp (60w is decent light) = over 120watts total. plus speedo. the E3L is rated 60 watts. maybe ok if you have a 35W headlamp, no indicators and don't sue your brakes but then you may have other problems.