I agree with your interpretation Nimrod177.
The reason I started this thread was that I was told by my RFD the FAC reg was the only option after confiscation and could not be offered the “reset to sub 12ft/lb at my cost”
I have a cheep chrono which I use to keep my gun inside the law but would like the option to confirm my old chrono is giving the correct readings. The fear of having my gun confiscated with out getting it back make me not want to have it checked.
Where would I stand legally if I was over but I had been regularly testing my guns on my chrono but that chrono was show to be wrong. Could it be shown I was ‘showing due diligence’?