Quote Originally Posted by JAZZCNC View Post
If he had a little more length and could afford slightly wider bearing/gantry plates I'd suggested going with 160 flat with 160 on top and with rails in same front and top positions. You have to think about the direction of cutting forces. The wider bottom profile makes the gantry stiffer in the direction of cutting forces.
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That's certainly more beefy than I had planned but I'm in this to build the best machine (supposedly within my budget but that vanished ages ago!) I possibly can. I don't want to start cutting and immediately regret compromising on something critical.

My gantry riser plates are currently 210mm width so this arrangement would fit. My concern is that the CoG of the router would then be well in front of the forward Y-axis carriage. Is this what you mean when you said about wider bearing/gantry plates? ie. I'll need to widen them to bring the CoG back within the two Y-axis carriages? Which would then mean a reduced cutting area?