I quite successfully applied this (https://www.thingiverse.com/thing:1010672) bearing in my project, but did not indicate this as a remix, because it is optional and is not the main irreplaceable part.
For example, you allways may use metal 608RS.
https://www.thingiverse.com/thing:973209 - Similar: You can use a different mandrel on the bearing
I attached the Cura 4.2.1 profile, as well as the g-code right away, which you could simply print on your Sidewinder artillery using PETG if your nozzle is 0.4 mm
My tensioner works well if you move it with the bearing as close to the Z axis as possible. Then the tension increases!
After printing the tensioner frame, it is usually required to separate the bobbin from the base with a paper knife, then swing it in and out with twisting movements. After that, lubricate a rubbing part with a drop of oil.
With a large bearing, if you print it too, and not use a finished metal one, you need to do the same. It can be difficult. Try to choose the horizontal expansion and insertion of the outer wall in Cura so that the gap in the bearing does not sinter. Everything is possible! :-) The result of the subsequent small backlash will please you.
Install the tensioner with the large wheel as close as possible to the Z-axis of the printer.
On 4:00 - ready to use