Derailleur cage was removed during chain setting. A pin that is forcibly inserted is separated and cannot be reassembled. Not repairable in case of cage failure. Shimano's derailleur cage disassembled equally. Shimano was able to repair with screw-type pins I tried for 4 hours to repair this derailleur, but the user cannot remove or insert the derailleur fixing pin. If it breaks, I should throw it away.
Thank you, received goods, highly recommend this seller/store, regards, Bruno