indeed.
If you wish to 'prepare' it for conversion, so to speak, I'd recommend doing two things:
1. First, seperate out the cannons and other components of your guns into seperate parts, i.e., barrels, turret, turret base, etc into their own seperate objects.
2. Second, re-connect these seperate parts in the multi-joint object editor. This will allow for a basic heirarchy to exist for the turrets. Do note, the individual parts must be exactly to the scale you intend them to be when you seperate them. This is especially true in the end multi-part turret, otherwise when you DO convert it to a different format, each part will be to the scale you set in the first object editor when someone opens it up in TS or the like.
Hope that helps, at the least. I'm working atm to try and convert fighters, but cleaning up all the internal polygons is pretty damn difficult, to say the least >_<