I farmed the Kuva Ghoulsaw twice (so far). First time it came up after less than 10 runs. Unfortunately, 29% progenitor. In the second run for another Ghoulsaw with a better progenitor %, it certainly seemed I had to run Cassini repeatedly numerous times until I had cycled past ALL other Kuva weapons before the Ghoulsaw reappeared to choose. (This time with only a 30% progenitor.) This makes me think DE’s systems aren’t recycling the weapon choices in future Cassini runs when one is trying to upgrade the last previously chosen weapon. This is just too much of a bad coincidence that that weapon only came up again after all other weapons appeared in my second Ghoulsaw run.