I have the Freud FT1700 every one is talking. I want to mount the Freud router to an extra Oak-Park mounting plate for a Dewalt 618.
Basic rout theory -- How do I center the big hole in the Freud Plate to the Oak-Park plate for the DW618's small hole?
Are you removing the Freud plate?
You'll have to drill the Oak-Park plate to match the mounting holes of the base of the Freud.
Your's should have come with a paper template that may be of use.
I could scan mine and forward it to you, but printing it may not result in a true scale image. (You would have to print it and use a copying machine that scales copies to get it to size according the the scale rules printed on the page.)
Your best bet, if you do not have the paper template is to look up and ask Charles M
on here and ask him if he can provide a "FT1700 Plunge Router Mounting Template"
The curious thing about the base screws is that only two are exactly opposite each other.
If you have the holes drilled, then there's a method of centering a plate on page 13 of the manual that can be used with a new plate.
Use thread. Perfectly bisect the new plate with two pieces of thread scotch taped to the surface at about 90 degrees. Have a pointed bit installed. Adjust the location so the crossed threads and tip coincide.