>I suspected memo bloat, however I thought it would be more gradual, it must've been some unusual event or circumstances - I copied the VCX/VCT to a different location, packed it and it went back to 100 kb.

That is an awful large memo buildup, if it occurred in a short time or without many class edits, now that you mention it.

I guess it's possible something peculiar might happen to the VCT if you don't build the vcx into the exe, and the users have write access to the open VCX constantly.

Another good reason to build the VCX into the exe.