Couple 'duh' questions, but its the little ones that can trip a person up.  
 
A)Ring and Sphereworlds
Okie I'm stumped as to how to produce these.  I see what I need, but that's an awlful lot of tonnage, more than the large transport can carry.  There's a trick (probably very simple too) but I'm missing it.
B)Population
I'm still trying to figure out just how much the population of a planet affects stuff.  Comparing two plants with shipyards  I see that there's a half-turn difference on my biggest ship (currently a star creater in a BC hull).  Was wondering if there was anything else that it affects, resource collection, etc.
Thanks