weapon/experience upgrades

[Taiji]

what are weapon upgrades really worth? +1?

is it possible to change whether the primary or secondary weapons get upgraded? if so how?

do both get upgraded if they are both melee?

is it possible to have missile units get their missile weapon upgraded instead of their melee weapon? if so how?

how do I change what experience does? as in I've seen it upgrade just attack and both attack and defence, how do I change this?

many thanks for any help with this!

[JaM]

weapon upgrade adds +6 effectivly and is displaying only +1. Most funny/disturbing thing is that even gunpowder weapon upgrade instead of rising ranged damage, is rising melee damage... it practically makes weapon upgrades unusable...

[Taiji]

JaM you are my saviour mate. You've answered so many of my questions.

Thankyou very much!