Tested different V-slot covers available on this site, as you can see on the makes on my profile, this was the best fitting cover, has a very good press fit but is still easily removable.
Available you'll find a file containing every cover you'd need to print along with g-code for the SV06 if you want to skip the slicing part. Or different files for each extrusion. I printed half the needed covers to test fit first.
Horizontal slot uses 2*172mm covers
Vertical inside slot uses 2*182m covers
Vertical outside slot uses 2*184m covers
No supports needed.
I printed in PLA (specifically Sovol PLA) but probably works with basically every other filament.
I did not print the bottom slots for the horizontal extrusion, since I don't think I needed those, if you want to, they are probably the same as the top part of the horizontal extrusion.
The author remixed this model.
Added the exact sizing to cover every slot on the Sovol SV06