So for those keeping up with new releases at the moment you may have noticed that 2SW has rules for research in ISAW games. For a game starting in 3025 IS powers have a BattleTech (Couldn't you guys have come up with a better name?) of 3, which allows, in addition to those things granted at a lower level: "May build D-rated units;
LAMs cost 3x". Now there's not that much at Tech Rating D, and most stuff either hasn't been invented yet or is normally available in 3025. CASE however is an exception, it's Tech Rating D, with an intro date before 3025, but it's not normally available in that era.
So can you build 'Mechs equipped with only this piece of advanced equipment in this era?