With the 3M dual lock you can add anything to your quadcopter from batteries (in addition to straps), receivers, transmitters etc. It's strong, detachable and very easy to use. Just cut the right size for both parts you wish to connect and lock it! I used it for my battery. Stick some on the frame and battery and click, strap it and you are ready tot go! Also my receiver is sticked to the frame this way :) I just love it! For smaller parts (< 1 cm2) it might be unasble. Other non-detachable stuff would be better off using double-sided tape.
Motor spin direction layout for a quadcopter X shaped setup CW - clockwise ( pusher propeller, usually has a R added to the type. eg:5030R, 4045R) CWW - counter clockwise (tractor propeller) Propellors sometimes have arrows which should correspond to the image above, but usually the propellors have the type written on them. To check whether the propellors are installed correctly, the text should point (facing towards the direction) in the direction the propellor will be moving according to the layout above. Extra tip when using CWW/CW motors: First place the CW motor on the CW location as in the diagram, for CWW motor on CWW location ;). The nut fasten direction is the opposite of the spin direction! If you hold the nut and spin the motor in the direction it should move (see layout above), the nut will fasten. This way you know your CW/CWW motor is installed in the right place :) For more information see go here !