Thanks for the quick response, and sorry for not having noticed it in decent time.
My owned techs (all are currently active) are as follows:
5 basic firepower units
1 advanced firepower unit
5 propulsors
2 turbochargers
1 weapon accelerator
1 ultramplifier
1 nuclearizer.
I am currently in the final zone, only a few spaces from the boss enemy of the zone.