Setting upgrade level to 0 easy

[Null]

I want to make a reset option for one of my maps. I want to set all upgrades to level 0, but there are about 40 of them. Is there an easy way to set the whole thing to 0?

 

[Pyrogasm]

No, and I believe some upgrades can't be un-set. The one that turns headhunters into berserkers comes to mind, though I could be wrong.

 

[Gnuoy]

set each upgrade type to a variable array then use a loop. that might save some time.