There are different opinions on this. But as it seems to be less straightforward than with other non heat-treated alloys, I‘d rather have it done professionally with the right tools, even though I‘m generally a fan of DIY solutions.
Your probably right. The only reason I'm hopeful I'll get away with it is because the seller send me a photo of the frame with a modern Mavic Ksyrium rear wheel in when I asked him to show me the clearances, and as far as I know they are all 130 spacing
There are different opinions on this. But as it seems to be less straightforward than with other non heat-treated alloys, I‘d rather have it done professionally with the right tools, even though I‘m generally a fan of DIY solutions.