Nice grips
I have changed the sleeves on a few of these and F1's , easiest way i have found is to have two flat pieces of plastic/metal with rounded edges (bit like an old butter knife) and then use plenty of fairy liquid .... place the two pieces of metal either side of the grip area and unroll the sleeve over the top . You can then move the sleeve into the desired position without it snagging on the grip bumps , it has always worked for me and only takes about 5/10 mins .
Not sure i would ever use thinners tbh as it might react with the rubber