I also own a Hanaho Hotrod SE joystick and am having the same problem that a few others have mentioned with PS/2 or sometimes keys got stuck.
I have read a few people have tried X-Arcade's Hanaho Hotrod Joystick Upgrade Kit With Switches.
I really want to fix the Hotrod Joystick to play it again. However, before I want to spend the money, I have some questions for those already bought the upgrade kit:
(1) How good is the upgraded joystick? Does it have any problem with USB ?
(2) I read on some forums that some people using the X-Arcade joystick have problem with pressing more than 3 buttons at the sametime. I know the upgrade kit page claim that it works fine with pressing 15 buttons simultaneously. Is there claim valid?
I have an unrelated question. (or somewhat related) I read that it's easy to add a spinner control (after the upgrade). Any idea on how much it would cost (rough estimate is ok) to buy the part(s) to add one? ( I mainly want to play Arkanoid with it)