I said to put the maintenance reducution on the colony ship, not on the colony module.
With a med tech start and a medium homeworld, with no construction bonuses, a colony ship costs 4850 minerals and the homeworld builds at 2600 resources per turn. The colony ship takes 4850/2600 or 1.865 turns to build. The standard colony module costs 2000 minerals. To get a build time of X, we need to increase the cost of the colony module to some amount, as modeled below:
Ex: 3 turns to build
1) Total minerals production of planet/cost needed for X build time: 2600*3=7800
2) Extra cost needed: 7800-4850=2950
3) New mineral cost of colony module: 2000+2950=4950
4 turns to build
1) 2600*4=10400
2) 10400-4850=5550
3) 2000+5550=7550
5 turns to build
1) 2600*5=13000
2) 13000-4850=8150
3) 2000+8150=10150
6 turns to build
1) 2600*6=15600
2) 15600-4850=10750
3) 2000+10750=12750
7 turns to build
1) 2600*=18200
2) 18200-4850=13350
3) 2000+13350=15350
8 turns to build
1) 2600*8=20800
2) 20800-4850=15950
3) 2000+15950=17950
9 turns to build
1) 2600*9=23400
2) 23400-4850=18550
3) 2000+18550=20550
10 turns to build
1) 2600*10=26000
2) 26000-4850=21150
3) 2000+21150=23150
I suggest that we make the colony ship take about 8 turns to build, so the minerals cost of the colony module should be raised to 17950, or maybe 18000 even.
[Edit]
I removed the
that appeared where it shouldn't have appeared.
[/Edit]
[ 18 January 2002: Message edited by: Imperator Fyron ]