the fastest when it is drawn as the string attachment point is moved upwardly to aperture 96 and then aperture 94 the lock up time increases and the distance the bow string 40 moves from lock up to full draw increases because the string travels further before lock up whereas the draw of the bow remains unchanged irrespective of the point at which lock up occurs string 92 can as an alternative be tied through an aperture 102 in a second arm 103 which also rotates with shaft 56 arm 103 is located at the opposite end of the shaft from arm 90 and it is an integral element of the pivotable arrow support 54 string attachment arm 102 accommodates bows in which there is a tendency for a string such as that identified by reference character 92 to pull sideways as the bow is drawn a finer adjustment of the point at which lock up occurs can be made by a loosening a fastener 104 which extends through one integral element 106 of arm 90 and is threaded into a complementary also integral arm element 108 on the opposite side of shaft 56 b rotating arm 90 relative to shaft 56 and c retightening fastener 104 this couples arm 90 to shaft 56 fixing the angle through which the shaft and arrow support 54 can rotate over the full pull of string 92 referring now to fig9 as bow 20 is drawn and shaft 56 rotates a coil spring motor 110 in arrow rest housing 52 is wound to this end one end of the spring is attached to shaft 56 and the opposite end is fitted into one of the multiple apertures 112 in a stationary end cap 114 see also fig1 when bow 20.