my K7 has 1,3 version and I am very satisfied with it.
While I was reading this text I wish to update my "darling".
And I did it.
I was following instructions and finished it succesfuly.
(first V 1,4 and V 1,5) My K7 now works good without any problems.
As it was said before, differences are not so important for playing music.
My opinion. If procedure is correctly done, you can get more with a few effort.
I understand all who have distrust for update but don't understand Panasonic UK.
Why don't they test new update and say if it is good or not and absolve this dilemma?
Best regards from Leon !