Not so much the track of the upper blades...thats done by twisting the blades...you need contrasting colours on the blade tips...and go hover if one of the colours is higher than the other while hovering at eye level then you need to gently twist that blade so it 'flys' down a touch...repeat the exercise till the blade tip colours are a nce blur...then the tracking is ok.
No the flybar if its out of kilter will cause some erratic behaviour...just adjust a half turn in or out ang go hover around...if its worse then adjust the opposite way etc etc.
I used mine with a small hook made from a paperclip to pick up loads
quite good fun and very intense flying...like the hoop idea though...how about a flaming hoop
make sure to get a fire extinguisher there first though.
Rob