I thought 5 was way too OVERPOWERED. If I read it correctly it's like a crimson cluster missle which we have a limit of 20 in the game. there would be no point in having sabs then

I like the idea.. as everyone else said would have to be tweaked for power.. but make a sort of "Personal" CT Lab / Universal Service Terminal would be sweet. I would say you counter its power with production ie something like this

Make the shipyard a Planet structure (perhaps unlocked via a mission) Size 20 no beneficial stats costs 10 ctp to build+50 Mil credits

For Discoveries - Each new recipe you discover is increasingly difficult (costs research) however for each shipyard you have built on a planet your chances of discovery are increased
as initial chance per discover + NoOfStructures installed * (.2 * initial percentage)

First Recipe - 20% chance + 4%/additional so 1 planet 20% chance per attempt 10 planets 68% 20 planets 86%
Second Recipe - 15% chance +3%/additional so 45% chance at 11 planets 75% at 21

And then you can scale the recipes that can be found/used and base them off of how many structures you have installed and obviously all the recipes cost something to build them wheter that be EM ctp artis etc .. can be hashed out


IE

1 structure installed possible recipes name them what you will
att +5%
Def +10%
Scan +50
Cloak +75
10 Structures installed
att +10%
Def +20%
Scan +100
cloak +150
Planetary Structure Size 1 arti 1 Mining 1 (max 1 per planet)
Ship Structure size 15 Att 50 Raid +1% max 3)
20 structures isntalled
att + 15%
... etc ...
Ship Ally

the point is .. its not supposed to be expensive to build .. what makes it expensive is the idea that 20 space on a planet is being taken up by this building and no production is coming out of it .. so you have to sacrifice a good chunk of production to have these on enough planets to get the top discoveries and create the top recipes..