Had a quick blast with it in the garden. Grouping was appalling, was misfeeding badly too. Took it apart, tear in the stock rubber! Good thing I was planning on swapping it out anyway.
Put the ML Yellow in there, works a treat now.
Snappy trigger on a 7.4, I don't feel like I need to put an 11.1 in there. Will give it a proper go on Sunday.