lol... you guys are funny..
its fun having a cool car and if you feel that taking weight off makes you way faster then I am all for it.
but guys like cherry and bob and wildcat also have points.. a little weight especially when a car is balanced and a good setup can also be fast.. or even faster .. if the weight settles the car down and adds just a little traction going into and thru and out of a corner.. even if its just 1/4 a second per corner.. with an average track having 8-12 corners you may find yourself going 2-3 seconds a lap faster :-)
having a car that's set up to your liking, being able to drive fast without crashing and also learning how to preload to clear jumps like triples coming out of a corner that others find hard to do are all important as well. wont matter what your car weighs if you crash 3-4 times in a race.
point is.. do what you like and have fun doing it.. ;-)