!! USE AT YOUR OWN RISK, THIS MIGHT DAMAGE YOUR CASE. !!
 

This is the Steam Deck case handle.

I found carrying the deck around with the stock case was far too uncomfortable.
With this, instead of carrying your deck around by your fingers, you can grip the whole thing with your entire hand!

Simply superglue the two pieces onto the usual handle.
Ensure your Steam Deck is out of the case while installing to avoid any damages.

There should be enough clearance for your fingers to comfortably slip under.

Enjoy! ;)