Cheap material more than anything. I've actually seen bubbles in the plastic before where one broke. I do happen to have an old FF one that I keep in the closet for extreme emergencies, but its so porked I cant really fly with it very much.
First trick to getting any usefulness out of the Logicrap sticks is, uninstall all the software, the drivers, and run the utility. Take the CD and before disposing of it forever, reboot and then reinstall JUST the drivers, and then say bye bye to the CD. Make a christmas ornament out of it, or use it for skeet shooting, play frisbee with it, do something, anything but reinstall the software off of it. Whatever you do, DONT put it back in your computer.
Hook the stick back up, and set it up in Windows. NO CONTROLLER SOFTWARE. Just calibrate it. Go into AH and set it up also. Calibrate, set your buttons, etc. Set your dampers to cover any spikes. The left pots seem to be the worst for some reason, but the twist rudder gets all spiky too sometimes. Not installing the control software seems to help, but it never completely goes away unless you buy a new stick.
Last thing to remember about Logitech is NEVER, under ANY circumstances upgrade your drivers from their website. It has never failed, no matter what version of driver I tried to install with one of these sticks, upgrading from the website totally PORKS everything. Whatever problems you might have had before will become twice as bad, if not more.