I was adjusting my Ehknown and I just had to use my teeth 
to grip the wooden axle as it wouldn’t come out on one side (both caps were removed).
I was too afraid to use any metal tools on it, because it’s wood. I tried grabbing it super hard with my hand and with a grip cloth and neither worked… luckily the ol’ teeth worked OK to grip it strongly enough to come out otherwise I’d be in scary drillin’ town and nobody wants that!! 