The r10 mkII is tuned fairly well out of the gate. What are you looking to do to it? The trigger is owner adjustable, and as you know, it is factory fitted with a regulator. If you look at the Airgun gear show review of a UK spec .177 version on YouTube. Giles who runs the channel, was blown away by its performance. It does not need much more refining. The only thing, I do hear about them is the factory shroud is useless. There are no baffles in it, and that makes the gun VERY loud.... Talk to Nick at Air Superiority, he can get the HuuB shroud kit for it, that replaces the stock shroud with a full shroud/moderator set up that looks basically stock.
