I couldn't find a tool I needed for love nor money so I set out to make one
Brass tube 9/32" and brass rod 1/8"

Grind and file


Bend the rod

Go mad with heatshrink

Guessed it yet


YES its a 3.5mm jack tightener


Works a treat, no more slipping and scratching panels, just make sure the rod sticks out enough to engage the hole in the jack and it can't slip
cheers
FRED
Brass tube 9/32" and brass rod 1/8"

Grind and file


Bend the rod

Go mad with heatshrink

Guessed it yet



YES its a 3.5mm jack tightener



Works a treat, no more slipping and scratching panels, just make sure the rod sticks out enough to engage the hole in the jack and it can't slip

cheers
FRED


















