Shanling tube cabe removal assistance

I was never able to completely remove the lower ring -- I could get one post out and then had to rotate the ring away. The first time I changed tubes I had to use a needle nose grip to loosen the post on top of the lower ring -- wrapping the post in something to protect it from scoring with the needle noise. Hope this helps.

was it the Shanling that tubes cant be swapped by the customer?...I think there is a player that the tubes wont come out to swap, I could be wrong but it just might be the Shanling. Dont quote me tho:)