Hi, could you please helpme, most of my work is duct design, and thinngs related with ventilation... ok, i have a problem, i would like to increase my duct pallet options adding other kind of elbows or Tee, or duct branches.. i was searching the libraries and i found that there are a lot of duct fitting that i cant find on my actual duct pallet/menu, those files are .itm extention, and i really dont know what to do with that... could you explainme how to add those fittings or to the duct pallet. do I have to download every fitting that i would like to use?

I have made a list with the command makepad + number, but it's really annoying doing that for every branch o coupling or derivation that i need... so, help please?