Your math is correct from what I can see, its what i do but scaling a Pep can be tricky. What you have to remember is when scaling Pep, is thet when you scale up/down, it scales in 3 dimensions, length, width, and height. So if you need to scale it up to be taller, it will also scale wider and thicker. Take the chest plate for example, to get it tall enough, it will also spread out under your armpits and make your arms stick out funny. :/
So scaling up that much in Pep might give you some pretty wonky armor. If you have any kind of 3D modeling software available, like 3Ds Max, you can import the file into it and tweak the X, Y, and Z scale accordingly, but then when you put it back into Pep Viewer, but you lose your original scale and it must be scaled back to original size with the math you did. So taking a model up this much of a jump is probably not the best idea im afraid, Im just trying to save you a lot of work and disappointment. I do hope you find what your looking for and get this Space Marine up and walking some day.
