As an update for 2019 i finally managed to fit the Boomslang to my SIII (this month). The loom supplied still has to be extended both sides so i bit the bullet and extended it so the original headlamp socket which the new H4 plugs in to now sits nice and neat behind the front panel with both relays. The headlamp bowels required the new ceramic H4 connectors to be temporary removed but was a simple operation. The old offside headlamp socket was just unplugged from the original loom and stored. Verdict - great improvement but series owners still need to extend the loom.
Rich
Rich