so ive watched tons of videos and got tons of different answers. how do i adjust valve lash and set the nut correctly on top of the rocker arm? i followed this video and it makes sense, and i even turned the engine 4 times at 90 degress each turn time. my concern is, that even though each pushrod feels tight and doesnt move, when i turn the nut a final 3/4 of a turn, there are a few nuts i can actually back off with my fingers. theres just no way this wont back off quickly when i crank the engine. the only thing i can say that i wasnt clear on was his "zero lash" when turning the nut with each check. when i do absolute zero lash i can still turn the pushrod with my fingers. do i need to keep tightening until i cant spin the rod as well? is this the thing i missed? also a few of the rockers have a slight bit of play from side to side once ive completed 4 complete turns of the engine via crank. what am i missing and what works for sure? i dont want to mess this up by something so simple.