Ohhhh... Are those Screw inserts for the joysticks!!!! That is a great idea! I REALLY did not want to drill thru the top to mount them.
You did read about them in this part of the FAQ, right?
There's also a picture of the type of threaded insert to avoid for MDF -- very useful if you're not getting them from GGG or Ultimarc.
Yup, the FAQ had some good advice on the inserts. Those inserts you shouldn't use are for use with hard woods and have a fine thread to them. It is important to note because if you tried to screw in the course threaded ones into a hardwood you would probably break threads off and would likely warp or collapse the insert. I bought mine from GGG because the price was far better than Ultimarc. I also bought some from Lowe's and I made sure that they were the courser thread for use with MDF. They worked perfectly for mounting my screen to the bezel although they had the slot for installing with a flat blade screwdriver instead of the hex for using an allen key to install. The FAQ shows a slotted, fine thread insert, and I wanted to point out that the threads are the reason not to use in MDF not the slot.
I will also note that Ultimarc's trackball (U-Trak) comes with some very small inserts that are not threaded and are press fit instead.. Probably not the best for MDF, but they seemed to work just fine. I will see after I have a few drunk friends slamming the trackball in Golden Tee.. but I am confident it will hold just fine.
FYI, if you DO just put a wood screw in MDF or particle board and you have to remove it and screw it back in, if it strips you can take a toothpick and put wood glue on it, stick it in the hole, break it off so it isn't sticking out, and put the screw back in and it will hold again.
If you ever need a super strong way to mount something in MDF, tee nuts are the best way. MDF is strongest on the flat surface since it is basically layers of thick paper (MDF is technically just thick paper, not wood), and a tee nut plays to that strength. You will break a bolt before you pull a tee nut through MDF.