ok, so finally i understood the concept. so you spin until you get enough for the first camera, then throw it on the belt right away. keep grinding cameras until you have enough for the second item. grind that on the conveyor. up the luck. and for fun check out some arms manually. should something have negative result (which doesn’t make sense for me) you can click outside and throw the item in the bin. with sufficent luck level throw arms on the belt and grind them.
didn’t see any difference with the multitool upgrades and didn’t figure out why my items bring in 150% of the value.