It's not just the 3878 but the 89--- movement series as it is used in many different models.
I have never read that the flyback should not be used? I have two versions of this movement (89361 and 89365) and have never had any issues at all with the flyback. You will also note that there are many, many people who state they have had no problems. I have followed these threads on various boards and in particular the guy who was very vocal stated in one thread that he repeatedly pressed the flyback and had issues. In my opinion with any mechanical device there is a possibility of failure if you continually/ repeatably use it in a way that it was not designed for. In my line of work we have customers who have continual problems with equipment whereas we have others with identical equipment who never have a problem. In the majority of cases it is the person using it that is the common factor to failure. Maybe the guy was unlucky or there is an inherent weakness with the flyback if used in certain ways, the only statement I can make based on actual experience is after having these gens for over a year I have had no issues.
I'm sure guys on here will have their own opinion, some based on actual experience but many on anecdotal evidence.
Take meowschwitz and his Spitfire that stopped, a number of people jump on his issue to justify the movement is no good, correct me if I am wrong or misread it but it sounds like there is a broken screw head floating around in the movement. Ok so it doesn't prove the actual movement is good or bad but in this case it is an assembly issue. The usual lack of good quality control from a chinese manufacturer making fake goods for low costs.
Same goes for the 5001 movement, some have had bad experiences and all the naysayers come out saying it's crap based on other peoples experience, not their own. I feel for the guys who have had failures but my experience so far is that the movement is good.
Such is life..............
