This is a neat wheelchair hack

Its amazing to me how personal 3D printers have opened up possiblities to folks to build custom things and idea’s.  This one is like adding a row machine to a wheelchair, which makes sense to be easier than push/pull release currently used.

http://www.3ders.org/articles/20150826-3d-printed-wheelchair-hand-drive-affordable-replacement-lever-powered-wheelchairs.html