[Saxon]

Seekers move at a different stage of combat than ships, so the non-moving seekers would only be a problem if the enemy chose to move into their space. Another idea, but possibly something that is not modable, is a seeker that sits still until a ship comes into striking range, then rapidly shoots across the intervening space to detonate. A fancy magnetic mine. This could get fun, as increased tech levels increase the strike range. If you were used to fighting the old mines and then face some upgraded ones, it could be a nasty surprise.

Puke, the solar sail tech in a bit past me, but my high school physics suggests that something that bounces off would take a lot of it’s energy with it, while something that absorbed it would keep the energy. However, it might get heat energy instead of kinetic energy, so reflection might be better.

In the real world, I heard that a private firm launched a real solar sail near Russia a week or two ago. Can anyone confirm this or am I being made fun of?