I finally pulled the trigger and bought a roll of Claessens linen. I read a lot of reviews about stretcher bars and found the only ones with consistent good reviews were the bars by Utrecht. I did order some standard and heavy duty Utrecht bars. I estimate I can make a canvas with this linen and bars for about one third to 1/2 the cost of a stretched ready made canvas in the 20x24 range with (i feel) greater control on the quality. For those that make their own canvas, what bars do you like?