Please don't do that. The older R/N/L insulins are clearly not as good as the newer insulins, that much is true. But they are sufficient to live a relatively healthy life as a diabetic. You need to be more careful and strict with your diet and activity, but there's nothing inherent in them that causes blindness or death.

This isn’t true. I’ve tested Novalin with a Dexcom and it’s possible to dose correctly and keep glucose in an appropriate range.