I have converted a lot for jim-mechanic to work with tgiann-inventory. there are a few steps you need to take. The crafting bench, and items for repair and upgrades are working along with mechanic stashes. The mechanic shop I have setup through tgiann-inventory and I do not use jim-mechanic config for the shop. MAKE A BACKUP FIRST BEFORE ANY CHANGES.
STEP 1. Go to your Jim-bridge. Go to the crafting.lua file and copy and paste my code.
STEP 2. Got into jim-bridge and change QBinv to this
QBInv = "tgiann-inventory", This is just for simplicty, change how you like.
STEP 3. Go into jim-mechanic/functionserver.lua
(this may or may not work for you but no harm in trying. The main things needed is jim-bridge)
and copy and paste my code.
All codes will be linked below.
Disclaimer
I do not give support for jim-mechanic, nor tgiann-scripts, I just give a helping hand when im able to, but im not always correct.