No. Claptrap's Secret Stash is 4 slots with no upgrade slots. The stash persists across all characters though. Put inside up to 4 items, those items will be available to all of your characters once they do the quest to open the stash. So it would seem that the Secret Stash wouldn't be within the savegame, but maybe inside the profile. I'm just guessing at that part though.
[Edited by OffCentered, 10/7/2012 5:45:21 AM]
It would be possible, but it won't have an effect. For some reason the game won't read skill increases if you just increase it via memory editing, same for decreases. Even when you change a skill level and add another skill point to something, it won't accept the changes. Easily noticeable with Axton's Overload and Nuke skills.
Also, is it normal, that the orange weapons from the slot machine are a few levels below you?
Loaded editor in admin.
loaded game, activated editor
changed bonus stats, save game & quit, made sure it was saved.
and reloaded the saved game.
• Unlimited Health
+ 16 more options