Bloated Max File

[VelvetElvis]

I've got a max file that has been bloated in size. Even after deleting all of the objects, the save size is still 200mb. I've tried the usual tools to fix the scene, Sini, Scene Pruner, etc. Yet, nothing can seem the clear the file up. Do you all have any ideas?

[UPDATE]I think I tracked it down to some splines, but still doesn't make any sense.

[VelvetElvis]

UPDATE #2. I figured it out, it was a native Substance material in the scene. It was one of the lined stadium concrete wall substance materials, which the sbar file is about 200mb. Does anyone have any tips with working with native substance files in Max or is it just better to export jepgs from Substance Player rather than load the sbar's directly inside Max?