Never heard of tapping sycamore, does not mention anything about in Wikipedia, however it is not in the maple family not sure of mixing it, your resulting syrup will probably not have a maple flavor.
2008 700 ranger xp sap hauler/45 hp 4x4 tractor/028 super stihl
2x4 mason hobby/blower/new for 2014 smoky lake hybrid pan
2014 300ish buckets and still need bigger evaporator/14 x 20 square log shack
2015 2x6 drop flue phaneuf approx. 325 buckets, 1 year older, not sure about the smarter part ?
gets expensive in a hurry!!