Thank you Ben, Andy and Rodney - much appreciate your comments
It was a really challenging object to represent in pure narrowband while including surrounding fainter nebulosity. No doubt Trifid looks best in a familiar red and blue when done very well like in Andy's recent images, but my goal was to do just narrowband and I was keen to try including NII, so there you go.
My next image might be just HaRGB for a change and because I really like Lee's recent HaRGB Lagoon. That is unless I will yet again indulge in pierogi spiked with golden cups mushrooms