I bought a swing weight scale from Golfworks a few years ago and I have used it a lot. My clubs were all D-2 swing weight, but I bought a hybrid with a swing weight of D-5 and hit it very straight, so I added lead to the rest of my clubheads and made them all D-5. Here is the model I have:
The GolfWorks V-Line SwingWeight Scale
If and when we move to TV, you could certainly use it.
As to the "shaft adapter", are these what you are looking for? I have no idea what they do.
OEM Shaft Adaptor Sleeves - The GolfWorks