I have an IWC Portuguese rep with the a7750 movement and I was wondering how hard it is to lube the movement yourself? I know the pros can do a full service (I assume that is disassemble, clean, lube) but that would cost as much as the watch so I'm wondering if it's possible to remove the back and lube what you can? I have some really incredible liquid lube (used by NASA no less) that lasts seemingly forever and I was hoping that simply squirting some of that in the right spots might help smooth things up and increase longevity. Again no disrespect to doing a proper service and I bet that is tons of hours to do but I was wondering how hard it would be to add some lube to a watch which is already working well (I mean without disassembly other than removing the back). Thanks for any thoughts guys. I'm hoping that some minor proactive DIY maintenance might be doable. ?