I saw yes, just tested myself. Block was apart, i blowed on the intake and the air escaped trough the outtake even when i covered the back of the center whole, this i had mentioned earlier but not given any attention.
Now i found a capsule in my workshop and made it so that it sealed it, and the base was not bowed.
But the nozzle's, cant get them anywhere in the country here... Will search for a home made thingy, thanks anyway :) .