The only putty I will use is still Kryston Heavy Metal. I have not found a good enough replacement. I've checked the new Heavy Metal, it is the same as the original, but as @Golden Paws has said, putty can get misshapen and in the hot weather in the UK at the moment, or Signal crayfish will pinch and eat it, (and tungsten loaded rig and anti-tangle tubing).
Your alternatives look good, and as long as they work.
I use match or pole anglers olivettes, either with the hole through the middle or fixed with tubing, lock and slide, usually Drennan.