Thanks, man. My research was limited to youtube videos so far, didn't have the time to research further, but i will. The octocopters that i saw i think that every pair of motors were spinning same direction, and with same propellers.
The whole idea of this project is to have fun, of course, but also to achieve a powerful machine. Not just something like the 42gr octowhoop that barely lifts from the ground
My fear is that the combined thrust of both motors, one on top of the other managing the same air flow, wont be the same as every motor separated and managing clean air. But, in the other hand, i'm saving a lot of weight by using a 3gr frame for the whole setup of motors....
What you said about different blade count in every pair of motors is also very interesting.
Anyways, it will be fun testing every possibility, i just want to collect all the info that i can to save time and money in the whole process.