I really liked DantRush's tool holder for the Ender 3 / CR-10, but I was worried about the hex wrenches and flush cutters being in the tool path on my Ender 3 Pro. While I can't imagine it would be nearly at the max height and far right of the frame often, I didn't want to stress over it. Quickly remixed over on tinkercad to shift the holes for the tools further to the right. Then I remembered I'm forever trying to find a spot to put my spare SD card down (I tend to run one in the machine, the other at the computer for prepping files, then rotate around). So I remixed it some more in tinkercad to add a few slows for SD cards in the new blank area to the left. I made the slots go all the way through to minimize the need for supports while printing (I print this upside down).
I have included two versions of the remix. One thinner one, without spaces for SD cards, one thicker one with slots for SD cards.
Printed it on my Ender 3 Pro with red Hatchbox PLA. Printed it upside down, with supports on (it should only need supports on the flush cutter hook).