DIY wildflower seed harvester

I was tired of picking individual gaillardia seed heads and after some searching found chamomile rakes online that looked like they would speed up harvesting the seeds, so I made my own. This print uses 3 1/2 “ framing nails (~.131” diameter) to make a rake that grabs the seed heads. To assemble place a nail in every other hole (might need to be reamed with a slightly larger drill bit depending on your printer) and then come back and fill empty slots so that the nails keep as consistent of a length as possible. I came back after placing nails in and filled the channel where the nail heads are with superglue as well as along the front of the holder just to reinforce everything. 

The box/hopper is made from scrap wood and ½" aluminum rod for the handle. I put a short wall of plywood behind where the rake mounts and superglued the rake to the wood. After using for a bit I found that the seed heads took some force to pop off and would sometimes bring the plant up with it, so I added a few razor blades that are just bolted to the rake with some m3 screws between the nails. In addition the seeds tended to spring out the top so I added some polycarbonate to make a lid. Overall it works pretty well, the handle could use some ergonomic improvements and the razor blades are a little flimsy for efficiently cutting the dried stems (one broke and fell off after about an hour of use), but I plan to get some heavier duty utility/scraper blades to replace them.