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Will work for cross bolts on ring ands action screws
On a T15.. not sure I'd go above 25in/lb without holding your tongue right, or it could be messy.
If the screws make a noise, they are...

10-20 in/lb is about right
To be honest, at the low end of the scale on a low end tq wrench (sorry) you prob wont even feel it click

Need one that does low inch/lbs
Just like the forums Wheeler lapping kit has :D

Price of any of my torque wrenches (or any other decent one) they would be traveling 1st class and I'd be checked baggage!
A tq wrench that will go low enough for rings and cross bolts is not much...