No tracking is pretty simple, i meant your sentence didn't make any sense lol, or at least i didn't understand enough to give you a useful answer. 
What on earth are their tracking measurements about, -14/+14 what?
Do it the old school way - bit of string and a tape measure, guarantee it's just as accurate if you do it carefully.
The rest of the sentence - the bit about bushes, something after new ones and going in or out - still doesn't make sense to me, tried reading it a few times, but no magic moment of understanding has come lol.
What on earth are their tracking measurements about, -14/+14 what?
Do it the old school way - bit of string and a tape measure, guarantee it's just as accurate if you do it carefully.
The rest of the sentence - the bit about bushes, something after new ones and going in or out - still doesn't make sense to me, tried reading it a few times, but no magic moment of understanding has come lol.