The dilution rate would equate to the same ratio of water to developer regardless of whether you poured in 500ml for 120 film or 300ml for 35mm,wouldn't it? Or am I thinking about this the wrong way?
I've used that dilution before with D76 - and for the very same reason, but I don't recall my developing time being that long. I'll try and dig up my notes - it was a few years back.
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