This is such a great informative read... I guess the cheap 28XX can be done the quick and dirty way... if they are not 100% who cares... and a new one will set you back only 50 eur (should not exceed the service costs). A vj72, 23 or 7750 is a different story. They are hard to find, expensive to replace and valuable... proper care is eminent... Well I would take the Zig way. Just my 2 cent.