What is the best way of attaching a blue key to a normal keyring? The metal hook piece doesn't seem a hugely secure design given it pulls out to expose the battery.
I know its not the answer you were looking for but: don't
It fits great in the pocket as is, and as with all high(er) performing cars, the last thing you want to worry about is a clattering mess of keys as you hurl it through the twisty bits. Or maybe it's just me?
When new, they shouldn't pull out that easily but have a tendency to do so after a little while sadly, mine has done on both of my GTs. A poor design, I feel