I've been working on a canoe restoration my father started in 1948. He bought canvas to recover the 16 foot Kennebec shortly after he got the canoe. I still have the canvas, but it's #6 weight instead of the standard #10. The piece of #6 canvas is 60" by 18' and it weighs about 13 pounds. If it was #10 canvas it would probably weigh about 9 pounds. I'm wondering if I should go ahead and use it and not worry about the weight, or should I buy some #10 canvas. I would guess the weight difference in the end would also include a bit more filler. Would this heavier canvas suck up a ton of filler? Besides the 4 pound weight savings and $90 cost, is there anything else to consider? The canoe was built in 1917 and some of the planking is a bit thin, so maybe it wouldn't hurt to have heavier canvas. Considering all the time I've invested in this, the cost is not much of a consideration. I'm having a hard time making a decision on this. Part of me wants to use the 60 year old canvas my father bought.