Comments sought on new build: A CNC Router for RC Gliders and Planes

[njhussey]

Cheers Jazz ;)
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My cunning plan is to get some of my 10mm 6082 plate I have and make a plate to go across the X axis and bolt it to the carriages like so....then put some 100x50 section on it to stiffen it....
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Then I can drill one hole one end of a rail and then using digital callipers (accurate enough???!!!) get the hole at the other end the same distance from the rail side, move the carriage to one end and drill a hole on the opposite rail at that end, slide the carriage up to the other end and mark the hole and drill that. Then by sliding the carriage up and down and nipping the bolts up I should be able to get them parallel to each other. I can then move the carriage near the middle and mark, drill and tap those holes. Once I've a sufficient number of holes drilled and tapped (every other hole?) I should be able to see if it slides freely or if it binds? If it slides freely......happy days, if not then epoxy it is! Sound like a (convoluted) plan?
P.S. I know the bolts should be allen head socket bolts and counter sunk but I couldn't be bothered to draw any.....sorry!