Issue The handle breaks #1
I use PLA to print all of my handles. The smaller handle breaks after a few uses. I suspect from hitting the lawn mower when it is let go.
I have made larger and stronger models and printed with 80% or 100% fill. The larger models survive.
I also added a thin resin coating to one and it has also survived but I think it would have done without the resin.
Use the largest latest version of the model for best results.