Can confirm after changing from J to E region with no loss in hours played under Unit Information

Have a quick question on servicing the WM1. Has anyone had experience servicing an export WM1 from Japan and any experience servicing a modded WM1? Wondering whats the process for servicing (hopefully never) the WM1 in Japan for an overseas user and if any further issues with a modded version.

Any tips for optimal burn in time if buying a used Wm1z?

New member from Singapore