Hello!I am planning to buy an HX effects unit as it seems a great effects platform.However I have read many posts here complaining about various hardware problems many of the first line production units have (extreme hiss,4 cable method not working,problems with saving presets,boot errors,failing to update etc).I haven't read an official anouncement from Line 6 about these problems.Are they fixed or i will buy one unit hoping i will be lucky and it will function as it should otherwise i will have to open a ticket afterwards to have it replaced? Thanks in advance.