Thanks @Grey hair and @fatbiker! So basically I shouldn’t worry of getting few fines on the screen of CU? My idea of inserting a fine screen between the capsule and the coarse screen of the CU does not add any value overall, related to cleaning etc..? I already have smell proof pouches. I use Ryot’s Packratz pouches. Slightly bulky for carrying but I do prefer the smell protection. Both can fit in a Partyvac tube that has pregrinded stuff. Or preloaded capsules. I usually have to two strains in capsules in separate zip lock bag and a third bag for empty capsules. So far my capsules have stayed very clean, probably due to the dryness of strains.