One of the most common questions is how do I retool torpedoes. Well the short answer is you 'rebuild' them if you will. Let me explain.
Say you want to retool the torpedoes that Randy was so kind to add to your home worlds, you know 600,700, 800, or 900 class 1 torpedoes.
Well since retooling them is a build code you have to put a 3 in the action code box. Then in the Location #1 box you put the planet location where you want to retool torpedoes. In the quantity box you put the number of the class of torpedo. In the build code box you put 300. But let me explain the quantity box a little bit.
Say you have 700 class 1 torpedoes on your home world. You wish to upgrade them to class 3 torpedoes. So in the quantity box you put a 3 for the class of torpedo you wish to upgrade to taking them from class 1 to class 3. Okay not so hard once you understand exactly how to do it.
But..... and you knew there was going to be a but. You always upgrade all the torpedoes on the planet with the build code 300 not just some. All or nothing. So if for instance you have 700 class 1 torpedoes on your home world and you wish to upgrade them to class 3 the cost is 100 per level per torpedo which in this case means 700 x 2 x 100 or 140,000 RU's. You're welcome.