Max, Thanks for your input... yes those are all 20 dp gears... but i am thinking about switching them to 16 dp gears. the shifter works fine. and thanks cory for answering the last question.
Edit - Also there will be holes in each gear just not to reduce weight but for what tytus pointed out (look at his post above). Each gear will be anodized.
EDIT- didnt want to post again... so here i go replying to alex from 469. yes i am considering what tytus has said. Also (if you see in the description of the picture) i am planning on moving the motor between the two plates. if i leave it like that i will sure mount it on the chassis somehow to make it stronger. thanks for your inputs.