i've just started using it and love it but this time i need 6in columns. Are the 9in ones easy to cut down and are they marked at each inch or what?
thanks for any help

The 9" ones are scored about halfway, in 1/2" segments. They're easy enough to cut with a hacksaw.

I went to Home Depot and bought a PVC pipe cutter and it cuts it like butter pretty much! I put the columns in and measure each one and then cut away.