Hello! I am the proud owner of a beautiful cuckoo clock I bought in Germany this Fall. It has an eight day movement with a music box. It keeps time and there are no issues with the music box. The problem is inconsistencies in the number of cuckoo's. At the hour it usually cuckoos only once, but periodically I will get 2, 3, 4, 10, or 11 cuckoo's. On the half hour I get 1-2 cuckoo's. The bird and door operate smoothly. I took off the face so I could see if anything was obviously hung up in the movement. In my professional opinion as a nurse, I don't see anything that stands out. I really know nothing at all about clocks other than what I've been reading for the past week or so. Attached are some pictures.Any suggestions would be appreciated. Thank you!