Siege engines and crew numbers

So can the number of crew members working a siege engine be increased beyond the number in the chart to allow for faster reloading and aiming?

Check out Siege Engines.

The heavy catapult section states that multiple crew members can aim that specific weapon faster.

Outside of that, you'd have to houserule it.

Thanks thats somewhat helpful so we know catapults can but nothing specific on the others.

This still helps my idea just was hoping for a direct fire not an indirect.

The catapult rules are from core, whereas the bulk of siege engine rules are from Ultimate Combat. One could make the argument that the earlier rules should be extended to all forms of siege engine.

Yeah the downside is looking it over it still takes a move action to get off so no single weapon flurry.