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I only had to do a few where ms_com ordered too many 138mm wide strips and not enough 69mm wide ones. But luckily they were only 400mm long and using a knife means practically zero kerf. They did go well though. Careful with the first pass and semi-careful with the rest and it was grand. You do get a bit of a burr where the blade pushes a bit of material up but it's easily knocked off with a light sand.
Ordered the strips already cut to width. I didn't have to do 2m rip cuts thank god, just cutting to length