Flexis are so fun to print! But those little fiddly bits can dislodge from the build plate, especially when printing at high speeds. Maybe you don't want to use a whole brim, it can be difficult to remove and use lots of filament! I am not saying this model is the best solution, I am saying it is a generic solution.

Credit to Articulated Lizard v2 McGybeer (https://thingiverse.com/thing:3505006/files) for the model on the build plate. This is not the model I am sharing, just an example of a fun flexi that may benefit from a brim.

Simply drag this model onto your build plate, center it, and slice! You may or may not wish to use the “assemble” feature in Bambu Studio, I don't. You will want to ensure the “empty corner” is your exclusion zone.

This model only works as a brim with a z of .2mm and a base layer height of .2mm, changing any of this may make this brim difficult to remove.

I peel the little edges off my models with a pair of needlenose pliers, the result is usually very clean.