So, I’ve had my Logitech G15 keyboard for a while. However, one annoying thing about it (like other Logitech keyboards), it has the annoying feature of a different socket for the F and J keys, probably intended as hints for if you take all the keys off for cleaning. Unlike my previous Logitech wireless keyboard which had the socket rotated 90 degrees, the G15 has a small plastic key/guide which means you have to insert the F, U, J and H keys upside-down if you want to use the Dvorak keyboard layout instead of QWERTY (because you can only seem to order Dvorak keyboards online, at great expense).
This is a diagram of the G15’s key sockets, looking straight down. The one on the left is a normal key, while the one on the right is for a F or J key. I didn’t use a photo here because my keyboard is so horribly dirty and a close-up shot of the socket makes me ashamed…
You can easily scrape off the key/gude with a flat-head screwdriver. You just have to lever the screwdriver up and down a little bit and that key scrapes right off, allowing you to put in keys from either type of socket. Only a small amount of plastic needs to come off, and you don’t have to push very hard.
The end result is a G15 without any upside-down keys. There’s no disadvantage to doing this to your keyboard, and it’ll continue to work even if you switch your keyboard back to QWERTY again.