A couple ways to find your old posts
Click your user name at "who's online" and go to your home page with stats. Then click "previous posts" from the selections at the bottom, and your list of posts will show up (if the list is up to date). Yours shows the previous post as of 2/3/06.
Another way is to go to the forum you posted in previously.
A third is to do a search (and again, hope that the searched postings are up to date, and have not lagged behind which happens).
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Most standard US PTO's on the rear are 540 rpm.