Thank you for reply.
I not sure have you tried loot all the wreckage from your MTU after you finish one combat site.
The most popular ratting drone ship is Gila and Ishtar. Gila have 440 m3 and Ishtar has 560m3. The wreckage from one combat site at null space can be easily more than their capacity. “Loot all” is not a option, you need cherry-pick the tags first and scope the MTU back to your ship. If you loot all, you properly can’t collect MTU and lose it, when hunters find it.
Check second item in PROS.