Hi guys,
i've received this mamba stack, but it looks to me like screw are mounted the wrong way. 
If i install this configuration there is no space between esc and frame... i'm figuring out how to setup this keeping the original softmount...  is that normal?  

I always install the screws with the threading pointed "up" through the base plate.  



I then determine how long my standoffs need to be to give the first board the clearance from the base-plate.



Essentially, run the screw up through the bottom, drop a spacer in to give you enough clearance for the ESC board that then install a standoff.  Drop the next board onto the standoff and repeat with another standoff.  I have kits of M2 and M3 standoffs in all lengths.  I find the little nuts they provide are hard to manipulate, so I have 4mm standoffs that I have removed the threaded part from and those are go in the top most position.

Hope that made at least a little sense.