Never worry about your fingers sliding off the levers again!
We recommend you get the finger cups soldered on by a local repair technician. Superglue will work, although the cups will fall off with longterm use so you'll have to keep re-gluing them. Once you have put superglue on them, don't try to solder them on later, as the heat acting on the superglue could produce some toxic chemical fumes.
Never worry about your fingers sliding off the levers again!
We recommend you get the finger cups soldered on by a local repair technician. Superglue will work, although the cups will fall off with longterm use so you'll have to keep re-gluing them. Once you have put superglue on them, don't try to solder them on later, as the heat acting on the superglue could produce some toxic chemical fumes.