I picked up one of these off Amazon for cheap, but never got the opportunity to use it before switching to the S3.
Be careful with small supports that take all the weight on a single point, and only propping up the end of the card. Especially on cards with short PCBs but massive coolers (flow-through) without much structural rigidity, depending on where exactly you choose to support the card it can introduce more bends to the PCB than you initially intended (and right where it matters, around the core/VRAM area).
In the Cerb what I did in the end was gently loop a ziptie through the end of the card (as it was close to the front of the case) to pull it up a bit, then use my L-shaped support to support the middle of the card.
Cards like the 2060 Super FE and now the 7900XT MBA have spoiled me. These cards have such ridiculous ridigity that they are quite literally impossible to bend even if you tried. The 2060 Super actually came with a slight negative
sag that never changed in the 3+ years I've had it.