As long as I'm plugging
The Machine Shop, I'll also add that a couple other neat features are a landscape record sheet which (I think) is a little more efficient. It also has the ability to dynamically change ammo type when the record sheet is generated. Modifications also include changes to range as a result of the swap (if applicable). It does MM export (also with ammo swaps). Some other minutia that's in there is armored equipment and turret-mounting. Tac Ops was a pain to fully integrate, but I believe all options are there. Most legalities are reconciled when equipment is added, with feedback if a placement or item renders the design illegal. Some legalities do have to wait for a full publish. Lastly, before publishing, it scans the entire database for other units which feature the same base, movement, equipment, etc. as what you're submitting. If there's already a unit out there which matches your design, it helpfully links you to it. No need to reinvent the wheel, after all.
I haven't had much to update it with since Field Manual 3145 came out (tripods and superheavies - more pain, especially the partial-crit rules). Just a few bug fixes here and there. A couple months back, someoe noticed I didn't have Incendiary LRMs. That's the nice things about having it driven by a database. Half an hour and a few SQL statements later, and the new equipment was available. No code changes or application restarts needed.