Hinge1of3 by ShuttleSpace

...latch hook by shuttlespace thingiverse could be used for rope tie offs

...rod end for linkage by shuttlespace thingiverse for mechanical linkages, cables, ropes, etc.

...bike headlight by shuttlespace thingiverse clip-on front light for bicycle head tube. norco has 40mm diameter tube here.

...heavy conical spring by shuttlespace thingiverse heavy spring, cone shape source: tracepartsonline.net

...90degree flat angle by shuttlespace thingiverse flat 4 holes, 90 degree plate, countersunk

...flat joiner plate by shuttlespace thingiverse flat plate with 4 countersunk holes, for joining things together

...elevator car buttons by shuttlespace thingiverse 16 floor elevator buttons make your own lift!

...coat hook, rectangular profile by shuttlespace thingiverse simple coat hook source: tracepartsonline.net

...simple 90 degree corner by shuttlespace thingiverse 90 degree corner without holes