I have just started doing core mining. Mining Void Opals at the moment. Trickiest parts are getting to recognise the cores on the pulse wave scan and placing the seismic charges. First run I ran out of seismic charges cos I wasted a lot and fitted a second launcher and since then have never run out on the first one. At least with core mining with the PWA you have a way of picking rocks that are worth prospecting. Like the OP with laser mining was getting frustrated as not finding any rocks worth mining and running out of prospector limpets before filling the cargo hold. Have never run out of prospectors core mining and usually come back with a load unused.The Quattro is great as a small miner. I must admit I don't use mine for that since I got fed up trying to do explody-asteroid core mining (I just can't get the hang of it). Now that market price for mined goods is adversely affected by large loads I only use Python miners - I suppose Quattros are good in that respect too.