I believe they are identical. 22-540 is the older designation.
"knowone" <finalact@earthlink.net> wrote in message
news:yn6of.4287$Tg2.1649@newsread1.news.pas.earthlink.net...
>A Delta 22-540 planer or the Delta TP400LS? I really need a comprehensive
> answer.
>
> Thank you.
>
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