Question: There are some small square wood blocks with slots in one side in my hardware pack. What are they for?

Answer: These are included with some of the VMAR ARF's as an extra item to be used if you wish to guide control rods at the servo end of the rod. They can be stacked or glued individually to the fuselage side with the slot "around" the rod to prevent the rod from flexing. With most installations they are no longer needed but if you find that the control rod flexes up or down you can trap the rod in the guide slots to limit the motion.