Just an update , for anyone with a Hitec aurora. The PPM encoder has arrived and works well with the minima 6l i brought. Ive noticed no latency and it only cost £4, its tiny and weighs almost nothing. The other receiver
(FrSky AFHSS hitec compatible) I brought also works really well on PPM! It also very small, its a 4ch but when using PPM its 8ch and much cheaper than all of the. I haven't tested ranges yet but it works well with my tyrant S (if the FC hadnt blown)
All in all im happy I found these!