Re: something to think about
If a person has lost every bee, each year, for 3 years, that's long enough to know he should change something.
I think you've come to the right conclusions Mr C, and will achieve your goals.
In my country we have a varroa resistance breeding program running that is now, after some years, producing some pretty varroa tolerant bees. Treatments have been used, but have not affected their methods of evaluation. Pin pricks and freezing have not been used, too simplistic and don't even relate to varroa.
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).