[friagram]

You could use stripper source and make map configs to remove those entities, and then well, you just need to deal with the weapon. You could just install tf2items extension, and use the tf2items manager to edit weapon attributes via config file. I think mabye though, that the zato will still kill people in 1v1 duels :/

Using an approach like this might give you more customization until you get more comfortable with sm, as opposed to a static plugin. In the meantime, you could also run a plugin to lock out the select few items that you can't edit easily (zatochi, soda popper, etc) - thse items with unique cooldown/meters - like tf2nounlocks.