thanks guys but after about 4 and a half hours of tinkering, dremeling, screwwing, and unscrewing

, i have finally got it to fit pretty well. i have made up a ally brace which holds the servo in place pretty well. i have also strapped the reciever to the top plate instead of beind the servo as it wouldnt fit due to the ally brace and overall it looks very nice and works great!!! so im happy in the end and sorry about posting how i did in the first place. when i get some pics ill put em on here and also put more in the "look what ive made section".
I now know how to fit a hs 81 servo into a rc18mt and i am well impressed with my self. so that is my Sunday afternoons work.

..thanks guys
also i will be bringing this along to pudsey this wednesday for the evening meeting, so hope to see most of you mini class racers there. it will be ace and i will gladly show you the setup i have made