You might also want to consider the foot controllers of racing wheels. You can get them really cheap used (eb**) and they provide much better resolution than Midi, I guess. And you get a racing wheel for free!!
any particular model that you would recommend? would that work with [hid]? best, r
% evol~~~~~~ http://www.mego.at/evol.html
% alku~~~~~~ http://personal.ilimit.es/principio
% imbécil~~~ http://imbecil.net
% foofoofoo~ http://openserver.cccb.org/~foofoofoo/index.html