I fill mine every time. I've got a platinum hot spot 2 jumps away. Takes about an hour and a half to fill it up and I sell it for 120 to 150 million.I fitted my Cutter out for mining on my recent trip, but now I'm back I refitted it again for Armed Trading. I was thinking of buying a second one, but I think 512T in a miner is a bit overkill. I rarely came back with a quarter of that on a mining trip.