No ninety degree position on a stroke/8 but other than that the instructions from LWB250 are spot on.

I advise against the aftermarket foam insulation with the foil surface. The foil has a tendency to separate from the foam after some time.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now