ShadowX, out of curiosity what tension tester did you buy?
CUrious, have you tried using different brand mono and seeing if your results change at the same weight ratings?
Two thing to consider. Triline knots strength comes from its initial "double pass" ..... try using that though for your own knot "modification" experiments. In the back of your mind..... lol.
Second..... in all my years of scientific know and connection testing.... I've seen MANY little things cause a great deal of variation in both straight mono breaks.... and knot strength testing.
Baseline..... you know what it is..... minimizing control variations to gain conisistancy. Establishing the " yardstick" so to speak. Recognize.... if YOU .... moisten EVERY KNOT you test.... with your own saliva... your asking for inconsistencies. Actually did study on the effects of "ever changing" PH and acidity ....in OUR OWN SALIVA....on knot strengths. Up to 27% .... consistantly.... on the same knot.
Now don't get me wrong..... when each of us is tying a knot..... PLEASE MAKE IT WET before "cinching". Sometimes thats just licking it right? Do what you've got to do. BUT KNOW IF YOUR SALIVA is effecting your testing? Success rates? Should you just dip it in a cup of water.... bait tank... in stead? Would it be really "Benificial".... to KNOW you can REGAIN that "statically" lost percentage.... by simply using another knot "lubricant".... besides our own saliva.
Remember......That's EVERY KNOT you tie... bar NONE! Every knot you test. Try your own experiments.... its illuminating. 10 breaks saliva. 10 breaks water. ALL THE SAME KNOT AND LINE TYPE AND BRAND. Let me know what happens. Good luck.