The difference in taste for some may be the fact that they're eating something that they've killed and butchered themselves, often for the first time in their lives. That can leave a "taste" in their minds that might interfere with reality.
I have one of those $350 tablet top pluckers that you can get on eBay (search for "chicken plucker).
Your plucker is a little slower but not much! I'll bet that replacing the bungee cord pieces with fingers would make a big difference!
I use the knife/cone method. Occasionally they flop, but they're restrained. I made my cone from a gallon milk jug.
I scald at 145 or so until the wing feathers pull out easily. I made a scalder from a small galvanized trash can by cutting hole and bolting in a replacement 110v water heater...
FWIW
Different effects of individual identification systems on chicken well-being
Poult Sci. June 2008;87(6):1052-7.
R L Dennis1, A G Fahey, H W Cheng
1 Livestock Behavior Research Unit, USDA-ARS, West Lafayette, IN 47907;
Abstract
Individual identification is a common method used in animal...
I just butchered my first two chickens this week.
I was too cheap to buy a cone and couldn't find a small traffic cone so just made one out of a good quality gallon plastic milk jug.
I cut out the neck area of the jug enough to let the head of the chicken stick out. I then cut out three sides...