Hi there, I'm planning on fitting a new movement to my friends Bell & Ross BR03-92. He dropped it, and it's stopped running, and the keyless works are not working too well.  It hasn't been serviced for 12 years and so I figured it would benefit from a new Sellita SW200-1 movement, which I could buy and fit for him for less than the price of a professional service. He would get a new movement, all lubricated and with a new lease of life. My concern is that I have only worked with Se