Quick Question about using Engineering Upgrade

[aple]

Does it work for normal units and not just heroes? It seems that using the normal method of picking spells, you can only pick Hero Abilities. But, it seems that doing Shift+Enter, you can input non-hero abilities.

Will this still work? Will it have any problems? Will it still function properly? (I'm gonna find out if it'll crash, Lol)

EDIT: K, it seems it does crash...Or does it just crash if you have some values blank...? 'Cause I only did it for one Ability Upgrade slot.

Is there still any way to use it with normal units, or am I stuck with replacing abilities via trigger? (I don't like doing that, because it can interrupt orders, cause delays, and do tons of other bad things...)

I wonder if using Chaos I could achieve what I want...?

 

[Cokemonkey11]

I'm pretty sure the engineering upgrade trick works just fine for regular units. What abilities are you swapping?

 

[aple]

I was swapping an ability that's based off of Devotion Aura with another ability based off of Devotion Aura. The only difference between the two is a longer range. They are NOT hero abilities...

EDIT: What trick, BTW?