IIRC, Windows sends multiple down events for repeated keys, but only one up event.

But it may not be possible as a simple mod to jkey, since jkey uses Windows' hotkey service, and I would be surprised if Microsoft offered something like that.

So you'd probably have to use a system-wide hook, which is kinda ugly to code, takes more system resources, and may not work when some applications are in the foreground. (dunno if any hotkey module already does this)