After having trouble with points on several engines being loose in the moveable arm, I just make it a habit to solder the points to the moveable arm. I had a problem on my Orwick that I was having trouble finding. It was hard starting, and after I did get it running, it would run fine for a little bit, and then start missing, and some times just die. I put it on the test stand, and watched the points while it was running, and when it would start to miss, I noticed oil seeping around the fixed point. To make a long story short, I soldered the fixed point, and now she runs like a sewing machine. For those who don't know, Orwicks have a rather unusual timer, as the fixed point is attached to a brass band that goes around an insulated tapered band, that is used for adjusting the point gap. Since this type of timer is unique to Orwicks, it is probably the only engine I know of that can have this problem.