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 "uric acid stones are correlated with the ingestion of red meat and alcohol."

Only if you consider "red meat" includes pizza, fast food cheeseburgers, steak dinner with potatoes and broccoli and bread and apple pie desserts. This is meaningless "correlation".

Alcohol is poison. The red meat part of that argument has been fully debunked, because the studies were bullshit. Does red meat equal more uric acid? Yes, but it does NOT mean it will form stones, crystallize, cause gout, etc. unless also paired with consumption of plants, which create inflammation and cause systemic failures that result in all the various stones you've dealt with. Treat your kidneys better by removing the inflammation caused by ingesting plant toxins. 
 Interesting points. I think gut bacteria has a lot to do with it too. If you eat seed oils for most of your life, you’re probably not going to digest certain nutrients very well. Is there a simple way of resetting your gut bacteria or do you just have to be patient? 
 There is no marker of gut bacteria health. We know next to nothing about the gut microbiome. For example, the fact that they influence the brain is a relatively recent discovery and hasn't even fully penetrated the establishment.

That being said, my guess is that the gut reacts the best to fatty meat. The bacteria break down almost all the nutrients they require to short chain fatty acids anyway.

Also, regarding the uric acid (urate actually) and kidney stones. 75% of kidney stones are calcium oxalate, so urate stones are a minority of stones. It has been common knowledge in medicine for decades now that blood urate levels correlate to urate stone and gout incidence, but no causal link has been established (i.e. a person with very high urate levels might never form urate stones or develop gout). It is why alopurinol, a drug that lowers urate levels, should never be prescribed for lowering urate levels in people who never had gout or urate stones.

What is necessary for urate crystals to form in the body is inflammation. So, even though red meat increases urate levels a bit, it is not itself inflammatory. This is why carnivores usually report a drastic improvement of gout symptoms when adhering to a strict red meat diet. 

What else increases urate levels? Fructose is exclusively metabolized in the liver, which produces urate. Since sugary processed foods, which are also rich in seed oils, are also highly inflammatory, you get the golden recipe for gout and urate kidney stones. The metabolization of alcohol also produces urate and inflammation, so people who have gout issues should cease all alcohol and junk food consumption. Instead of saying that, however, most of my ignorant colleagues recommend reducing red meat consumption, which is contraindicated for humans. 
 When I was full carnivore, too much fat just gave me bad diarrhea 
 It's about diversity in the gut.