The client already allows MeteorTears to be used in twin city.Quote:
how to setup a new item to be able to upgrade equipment in tc? for example a "met" that never fails or something like that
Why not just alter its description/make it hard to get and have it never fail in upgrades?
Alternatively you can edit the .exe if needed but it'd be easier to just rename/re-texture meteor tear as needed to fit your use.