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I have no first hand experience with the dewalt, apologies. I would think it would be a better unit than that erbauer though in likely all areas. I had a Makita 1.5 rail that was a banana once, probably a bit worse than in your photograph which pissed me off enough to just ditch the saw (a titan) and rails and go festool.
what's your background?
I'm a structural engineer (offshore wind).
Just like making stuff. I have a furniture side hustle when life allows it. Hoping to make it more of a full time gig some day.
Fortunately I can easily return it. Bit annoying but good learnings - seems like a waste of money if you can't get replacement blades.
One of the rails is flat, the other is more like a banana.
There's a DeWalt Dws 520 with two 1.5m rails going second hand not too far away, might be worth having a look at ?
Impressive knowledge btw, what's your background?