I use the DW621 in my table and have had absolutely no trouble with it. Well, maybe some trouble but that was more operator error (forgetting to lock the height adjustment on more than one occasion). I don't use a router lift or anything fancy, I just set the height once and drop it into the table. If the cut is more than recommended I set the fence up to take the first cut and just continue to move the fence back until a full cut is taken. After 4 years of doing it like this so far so good!
Hope this helps,
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