YOUR NEW TRAINER IS EPIC! PERIOD!
People who still need more should ask theirself why everyone else is fine.
Just tested the trainer on last mission, 270% difficult, EVERY option was working perfect and I can only thank you for adding so much options!
Please try this: Select the building where the unit in question is going to be built in, built a unit until it's finished. Then built another unit and while the built process is ongoing, press F6.