Yeah, if you put cloak level as must have, the design minister will look for a cloak component to put on the ship. Otherwise it will not design it. I don't know, how you want your scouts, but one possibility around that would be:
1. make scout hull size 140
2. set min. and max. size for scout to 140
3. remove cloak as must have
So the minister will use the biggest hull allowed (that would be the 140 scout hull with built-in cloak). For the other designs it chooses the biggest hull allowed as well, which would be the escort (150) at the game start and bigger hulls later.
There are probably other ways to make this work, but you would have to tell us more details on how you would like to do things.
Hope that helps

.
Rollo
edit: typo
[ 09 April 2002: Message edited by: Rollo ]