South indian style non return boomerang, 4 Valari Crash test

2016 04 03 Wikipedia says : A crash test is a form of destructive testing usually performed in order to ensure safe design In the case of non return boomerangs, crash test may be performed to ensure resilient design :) After taking another look at examples of Valari in it seems clear that I should have made a thicker arm (the one ended with the knob) and probably shorter also. But I m still wondering whe