Right now, you can only have different types of mining lasers, some of which have a better ore extractor beam. In the future, we plan to have a lot more laser variations, with some of them being heavily specialized in extractor beam operation. In regards to changing to dedicated tractor beams, this is not something we have planned. The MOLE's mounts are mining-specific, rather than generic utility mounts. In the future, when utility mounts and tractor beam items are implemented, we'll consider whether allowing mining ships to swap their lasers for tractor beams is beneficial, but currently that is not the plan.