> > I’ve been doing SMT assembly for 40 years. I have never ever seen anybody with a process > that “just worked”. They all involve some amount of fine tuning and design optimization. > Hi, Yep, The amount of tweaking required to get a good board build can be extensive. Part density, ground plane, part sizes, solder type, solder age, stencil design, board finish, and SMT pad design all add up. Tweaks in the oven and stencil can be required to make it work. It's the tweaking it that can get expensive fast... Dan