Longer handles for Wilger boom end valves

Our sprayer has these Wilger boom end valves. They work okay, but they are get very stiff and are hard to turn. They look like this:

Wilger makes a longer handle part, but our local dealer doesn't have any of them. So I wondered if I could 3D print one. I took one off an measured it and modeled it up in FreeCAD. Here's what it looks like:

Surprisingly, it fit on the first try. Here's the printed version:

Installed on the sprayer:

Version 2 with longer handle out both sides

After installing and using my longer handle, I found it worked well, but it seemed like it would work even better if the other end of the handle was also longer. Since FreeCAD is parametric CAD, I simply edited the original shape and changed the dimension:

Installed on the sprayer:

Files

The CAD files, including the printable STL file, can be downloaded from my Google Drive.

Materials

I printed my handles out of PLA plastic. This is not ideal, however, as PLA will degrade when exposed to sun and water. A much better choice for this would be ABS. I only have a PLA-capable printer at the moment, so that's what I'm using for now.

Printing and Cost

The handle was printed on my Creality Ender 3 printer with PLA plastic. It printed with the outside down, 0.15mm layer height, 20% infill, with no supports, in about 30 minutes. According to the slicer, the handle uses 5g of plastic (7g with the version 2 design with the longer handle). If we're conservative and say that 1 kg of plastic cost around $35 CAD, that's $0.035/g, which makes the cost of the part approximately 17.5 cents, plus the cost of electricity. So in this case, it's pretty economical to print up a bunch of these instead of buying the Wilger handles at a couple of dollars (guessing) a piece.