Yay! Paper finally published that is the result of ~10 years of on and off work.
This paper described the design and testing of a hydraulic valve that was designed in 2011/2012 as part of my thesis work.
Then after writing and revision, the thesis was published in 2013. https://hdl.handle.net/11299/159593
There it stagnated for a while because I wasn't really too motivated to publish anything from my thesis. However, I finally gave in to my advisor's request to publish in about 2017 and wrote up the paper.
I posted it as a preprint, https://dx.doi.org/10.31224/osf.io/N7AJQ
Submitted to a journal and the reviews said it needed some experimental validation. Which is a fair criticism.
With the pandemic and other things slowing everything down, we finally had experimental validation to add to the paper posted a revision to the preprint about 3.5 years after V1.
This was followed some journal rejections/revisions to get it to the point of finally being published. /fin
My advisor brought on an undergrad research student to setup some experiments with the valve and get some data. I really didn't have the time to put in any effort to this kind of testing.