This is just my opinion on the service of the 2 movements. The reason I give for not servicing the Asian movement is because of the quality of the parts. You can buy a brand new Asian 2836-2 or 2824-2 for around $100. A new swiss is around $220. The main difference I see between the asian and swiss is the metal used. The quality of the metal used in the swiss is much better than the Asian. When I loop the asian parts I can see that the quality and finish of the parts is much less than those in the swiss movement. Things like the mainspring and tub, the gears in the train, the date corrector wheel, the hairspring, the yoke, the yoke corrector and so on. While you can certainly service the asian movement, by the time you get all the parts installed and put back together, you're approaching the cost of a movement. You certainly want to replace all the gears in the train, those cost around $20. The mainspring, depending on the age of the movement could be very weak, again because of the metal used to mfg. The mainspring assy is around $20. So now, if you put all those parts in, you're almost at the cost of a new movement, including the labor. I don't think I've ever seen a third wheel and pinion break on a swiss, but I've seen several on an asian. The quality of the metal used throughout the swiss movement provides years of trouble free service. While the asian movements of late have been greatly improved, and really perform well, they are still not on the quality level of the swiss. For the money, asian is still a great buy. However, if you have a major problem with it, just replace it. You'll be glad you did. That's my take on it.