One problem might be that the windscreen was designed to work with the Primus Eta Express stove. The burner height on a PR might be different. If the burner height on a PR is higher, then the windscreen might not reach high enough. I would think that for sure you'd want to have the windscreen go a little higher than the top of the heat exchanger. You could extend the windscreen a little bit with a couple of paper clips and heavy gauge aluminum foil or similar material. It wouldn't be pretty, but when you're hungry, who thinks about how pretty their stove is?

HJ