Main Info
I had some trouble, sometimes, to print https://www.thingiverse.com/thelukec 's trackers. One issue I had was that there were not always the same amount of layers on both sides of the slit.
So I remade the base from scratch in TinkerCAD so that they were an exact amount of layers when printing with 0.20mm layer height.
 

Size
The slit/hole is 3.00mm and the pads are 2.4mm thick. That way it is a clean number of layers. Therefore the whole base is 7.8mm. I tried doing it with 0.16mm layers but they didn't come out great in my single test I did. Most likely badly calibrated printer

Trackers
We made 4 trackers, one for each of our players made with our characters in mind, those are the only ones without numbers on them. They are the Griffon, Mushroom, Snowsword and Tree models.
In my group we also wanted to have more different kinds of trackers, and our DM thought of the Creature Types. So we found some and made some pretty basic icons for all Creature Types. Not all of them are great, but they work! Most of the icons are found from game-icons.net
In addition, I also made some trackers with weapons; axes, swords, bow, shield and mage hat, for more humanoid characters.

Along with this, most models have numbers on them if you want to print more of the same kind of tracker.
Currently there are only 4 models without numbers. If you want to have the Creature Types  or Weapon Types without numbers, please just ask and I'll see what I can do!

If anyone really want these for other layer heights I might be able to make that.

PS: I made the 0.20mm base after I've already made a few of the Creature Types. So some of the “creature icons” may not be perfectly made for 0.20mm. I might take a look in the future to fix that if people have issues