Fully agree with you. My last flush (14) produced some yellowish stones and when I broke one of them - oval shaped, about 25mm long, 10mm thick, I found inside TWO
green stones sticked together and covered with this yellowish case. To me this kind of stones is produced by sitting in one place for longer time and compacted with
other stones. Also my last three flushes expelled more larger stones then the all
10 flushes before.