If you play games on PC, you will eventually come across this particular need to press a certain key on your keyboard for extensive amount of time. Yesterday I needed to press one key for 30 minutes to level up one of my skills, damn Oblivion!

You may install a software app to do that, but there are already plenty of keyboard shortcuts within the game which you need to remember and you would need to add several more to start and stop the software app. Sometimes it easier just to place an object onto the keyboard. Try this new Silly Keyboard Key Presser! Comes in two sizes, standard and large. Standard size reaches approx. 8cm far from the edge of the keyboard, large size reaches approx. 13cm far.

When printing threads (nuts and bolts), I recommend to print each object one by one, it helps to avoid stringing and overall gets you cleaner result. There is a setting for that in the slicer "Complete individual objects".