Hi Oyster,
Your 1966 Triumph Speed Twin is a very nice bike and project.
Many years ago I owned a 1966 Norton Dominator 650SS cafe racer.
I've got good but mostly bad memories of the Dominator.
But it was very fast and exciting to ride.
My Winter projects are finishing the Anzani Minor project (thanks to Rick UK for the missing parts).
This Winter I must also working on the 1934 Johnson OBL-70 and British Seagull Little Forty F341and FV5090.
The F341 needs another FV lower leg but the biggest problem will be finding or repairing the 40cc cylinder head.
The long term British bike project is a 1932 BSA 350 OHV.
When it's too cold in the shed or in the onboard workshop I can work on my 3D printer project.
If this project will work maybe I can print my own plastic outboard parts.
Jan