Used for troubleshooting possible heatbreak fan (not the hotend fan!) issues.
Printed using AzureFilm ASA, satin sheet, enclusure.
Adding inner brim may help, but the point is to verify the ability of the printer to produce the part using just the outer brim.
In order to resolve the issue of warping try this heatbreak shroud.
MK4S model does not seem to be suffering from this issue, so it does not require any additional shrouds (at least in my case).
The author marked this model as their own original creation.