Salvador had somebody made him (in a CNC lathe) retrofit tips for the Spintastics Trompo Grande that will also fit a Quicksilver.
These steel tips are great for fixed-tip play and the one he uses in the Toboganes tutorial videos. Salvador assembled kits with 2 tips, string, button and a ring that fits those spintops. Unfortunately, he did not consult me or I would have told him that US players would in general prefer not to play with the ring and instead have a longer string. Actually, Salvador knew we don't use rings too much but he swears by them and wants us to try.
I tested 10 tips in 3 Trompo Grande and 2 Quicksilvers. In one of each spintop I had to add a drop of superglue for the tip not to come out as they were smaller by a few microns. On an anodized QS it fit nicely as well as in the other two (recent) Trompo Grandes. But then I noticed some white residue as if Dale himself had used glue . . .
I will be bringing some to Worlds. The price is $5 per bag.