I am assuming it is a symmetrical airfoil?

From your description it could be main wing incedence, horizontal stab incedence or up-thrust built into the firewall/engine mount (or not enough down-thrust built in if it calls for some.).

Lazer cutting has nothing to do with how a model is assembled. That just gives you nice crisp pieces with burned edges. You still have to check alignment frequently and carefully when assembling.