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Are you sure it's a 10 milliamp draw and not 100?
10mah or 0.01a should in theory last 4400 hours or 183 days.
100mah or 0.1a would be 18 days, which is roughly what you're seeing....
197 cams and GrpN timing are two different things, just so you know.
GrpN is for stock cams with the intake cam advanced and the exhaust cam retarded.
197 cams it's only (usually) the intake cam which is advanced, usually 7-8 degrees.
In both cases you are moving the power band up, so low...
There's a decent brand of circlip pliers which I can't remember the name of, but basically they are a 2in1 action so that you flip the lever and they go from an opening style to a closing style.
Might be worth a search, saves you buying two pairs.