Hi
How did you get on?I bought a Rowan trigger for my S510 and it was too tight on the locating pin.I tried it on my sons S410 and it was the same
In the end I had to take the Dremmel with a very small diamond cutter to the hole.It fits and works perfectly now

Hello
New member from Sheffield and owner of an S400 and S510.S400 has a FT/HFT custom stock and S510 is awaiting custom laminate stock.