The Naish Cult is designed to flag out on a single front line, when you activate the primary safety release. I've never actually seen an HQ Neo 2 control bar, but judging from photos online, it seems to have only one single front line running up from the bar (which later splits to two lines in a Y close to the kite). So, I that would be a problem right there.

Second, the HQ Neo front line Y split is very high up, close to the kite. The Cult is designed to have the front lines split much further down, close to the bar. That could mean that the Cult may not fly correctly, since the angles would be different.

So, I would be very careful if I were you. For flying the Cult, you are probably much better off trying to find a 4-line bar that flags the kite to one single front line; and where the Y split is close to the bar.