It appears to me to be somewhat of a problem here engineering wise to crack this one?
As there are more than one ways of skinning a cat ( as they say ) perhaps a different angle of attack might be the way to go.
A personal approach maybe.
So I put it to you in a different format.
Winding back the old clock for me to about 1964 here I am doing my seconds exam in my fourth year of my apprenticeship.
I am going out on a date with a girl and to impress her and show her how far advanced I am I have decided to tell her all about my career and my seconds ticket exam.
As that week we have paid great attention to the Wheatstone Bridge and all it's surrounding calculations I am full of it and reel it all off the top of my head non stop.
I can see she is well impressed so I, with my underwater grease on ( Brylcreem that is, same colour and consistency anyway ) imply what a great catch I am with all this knowledge onboard .
However she tells me that since our last date when I apparently gobbed off about the Wheatstone bridge she too has done some research on it in preparation for our date and does not believe that my name really was Merlyn Ohms ( which in order to further impress her I had told her ) and subsequently tells me later in the evening when I drop her off that she is going to do a Wheatstone Bridge on me.
So what was she going to do?
It's the same answer we seek concerning measuring cyl. compressions with no dismantling but winding back your old clock in a similar situation the answer you seek should be easily obvious now.
Remembering The Good Old days, when Chiefs stood watches and all Torque settings were F.T.