So it looks like the shrink works. It doesn't do much, though. My image goes from 20.9MB, down to 20.3MB.and (just to check) you've already done Smalltalk unloadReloadablePackages? I managed to get down to a 12 Mb minimal trunk but I had to hack fix a lot of MNUs. Basically we have work to do to make those packages really unload.