So my surgical tubing came in this afternoon and I inserted it into the springs and picked deliberately firm and articulate on neck and bridge and it is greatly diminished, basically not noticable at all...and that's with me listening very intently.
The only problem is I ordered 7mm diameter and I wasn't able to shove it in very far so I spliced it down the middle then trimmed out a little more, but even then wasnt able to push it on more than 1/3 the way, but I flicked the spring and it was silient so I thought it might just be good enough to do the job and I'm pleased with the result.
I think ideally, I'd like to find the right diameter so I don't have to cut it to make it fit and so there's nothing that could potentially get caught in the spring. Also, I'd like it to run the full length of the spring vs 1/3rd the way so I think I'll need to spend another 10 bucks or so...but hey, there's not a lot of problems you can solve for 20 bucks so to me it's worth it.
The link you mentioned says it is 1/4" which is 6.35mm which I can imagine would still be a chore to shove in there...does it fit in easily in the stock springs? Once again, it is a standard 24 S2 so I don't know if it's the same springs on a core or other series.
And Thanks a lot for the suggestion.