ok that worked. so here is what you have to do (factory attached so you can see)
you need 3 models. the brim pads. the model rocket and a DUPLICATE of the model rocket. you can NOT do two proceses using the same file. Once again simplify 3d "ignores" what you tell it to do and mixes things it should not be mixing you have to TRICK it.
the first process is the brim pads. stops at 0.3mm
The second process is the model. ALSO stops at 0.3mm
brim has 1 bottom layer model has no bottom layers.
THIRD process is connected to the DUPLICATE of the model file an additional model (align origins) and this model STARTS at 0.3mm
POOF. it works. no zipper no custom models and no bottom layer on the model file but yes bottom layer on the brim pads. annoying but very doable as a work around for now.