Ideas-PLEASE let me know if this one is DECENT

Im thinking of putting out a small run of simple utilitarian modular modules in eurorack (most popular) format.
Perhaps as a part of the Simple Module run? if anyone has ideas for a name for them other than that, let me know.

proposed outboard joystick module design sketch

As the first  one,Im thinking Ill do one thats allows you to hook any 2 control or Audio cables up to a simple Joystick (the 2 cables being controlled by UP/DOWN, and LEFT/RIGHT directions on the stick). 
Heres the kicker though:
-I want to use a cable to allow an outboard joystick.  Perhaps 6 foot straight or 12 foot coiled?
Anyways, this crappy sketch ought to give you an idea what im talking about.
Ive seen modules put out by other companies with "force pads" (pressure sensitive resistors) & joysticks..BUT both have the operative device (joystick, pad, etc) ON THE MODULE...meaning that someone wanting to use the damn thing would have to HOLD THEIR HAND UPRIGHT ON THE MODULE IN THE MODULAR the ENTIRE TIME THEY USE IT.
That seems somewhat absurd and nonsensical to me.
Nobody wants to do that.
That's why controllers for game systems are NOT on the box itself.
Duh.
Anyways, I think Ill at least make 5 or 10 with a simple little thumb joystick and see how popular the idea or run ofmodules turns out to be.
If its really popular ill make more..maybe even if its only kinda popular because I think the idea is so good.
Any ideas for other "utilitarian modules"?
Perhaps another outboard one? Like an 'outboard mini-mixer console'?

Thoughts?

thanks