I keep forgetting that replacements are about the cost of resharpening. I
resharpen mine on my Tormek.


I doubt I would trust too many home machines for such a task. plus
just the time involved in the process. the delta the only hard part of
changing the knives is getting them out. once out the new one drops in
and you tighten it down.
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http://www.knight-toolworks.com
affordable handmade wooden planes