Did you follow the first guide about a tapejara 3 seater and Cant switch seats in PVX? What you need to do for a solo tame is switch the controls from flow to on screen. Then practice jump with a parachute from your tame and switching to grappling hook. If you can do it with a flow control then thats good for you. Once you have grappled your tame then whistle to attack target. It will follow the quetz and you shoot it. I guess the switch seat only works on single player or it just doesnt work now. Dont follow the tapejara method. Wasted engram points on that.