roller blind chain weight

Version 2.0 in the second print profile.Fixed overhang issue in the pan head hole.added a second design for flathead screws.Uses two DIN 934 steel M10 nuts as weight.Uses a DIN 7981 or DIN 7504 3.5 x 13 mm pan-head (or flat head) screw for mounting. These fasteners are easy to obtain in a hardware store.