mclan - like someone said in the earlier thread you started....go to Chi Long hobby at bukit merah...they have option parts for F103....and i saw a nice hop up F103 there also...i think belong to a poster here....kyew if i'm not mistaken...cheap some more
...like others recoomended you maybe buy a used fully hopup one as use the the car as a spare...cheaper that way...by the way i'm in no way associated to Chi Long Hobby or Kyew to promote their stuffs...just giving you a headstart in looking for stuffs you want