I wouldn’t bring your 1000 into this. It’s a purpose build bike and it’s very good at that purpose but it’s out of it’s element in the twisties and is definitely hindered. If stretched arms helped all Moto GP bikes would come stretched.
Go to a track day and have your butt handed to you by an instructor on a 50 hp motard.
1/4 and highway however your bike is in it’s own league.
USMC if you end up stretching it let us know how the change feels.