Jill of all trades, but mistress of few !

[Smiler]

The principle is the same if using screw or rack.
drive it from both sides and you won’t have a problem.

Of course it is. However, once you get into long travel lengths, unless you need the super duper accuracy of ballscrew then IMO R&P wins hands down. It is also much easier/mechanically simpler to drive both sides of a rack with a single motor and a single motor is what I would propose. Maybe Techserve could give us some insight on how they do things on long axes.

End of the day this is a router and R&P will give Julie all the accuracy she needs whether she is carving long panels or cutting parts for furniture. All I would suggest is she drives both sides with a SINGLE motor (bought from Zzap).

Jeff.