One thing I have learned (You may disagree) there are lots of plans and programs out there. People are also different and different people may respond differently to different plans.
I agree, the number one thing I tell people is: track your progress, then do what works and change what doesn't. The only reason I am trying to offer advice is because I think you could have even better gains than the numbers you have been giving, but I may be missing something as we haven't done a full evaluation

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Never looked to get bigger, only stronger. Is this what you call "Power"?
For someone who has been researching it for 40 years, I'm surprised you don't know what I mean when I say power. I am referring to the ability of the body to generate large force in a short space of time, i.e fast strength, closely related to explosiveness.
Endurance training was based on Cardio. USed to be running, but Doc sasy not a good idea anymore, so now it's the Bike.
Sorry, by endurance I was talking about strength endurance, not specific or general cardiovascular endurance.
The aim was simple. Not just maximize strength or push the most weight I could, but maximize my strength to weight ratio. At age 30, 5'8" tall I weighed 165lbs and my personal best free weight bench press was 325lbs. I could do 10 reps of 250lbs. If I gained weight I am pretty sure I could have benched more.
Sadly, now at ager 56 I need to try and eat less, and work harder. I now weigh 175lbs, probably shrunk a little and my 10 reps is at 225lbs.
Without any further details, I would have recommended a rep range of about 2-6, 3 sets, 3-5 min rests and a 30x tempo, with a weight you end up pushing it like it's going to move quickly, but it will only move slowly.
As you've probably encountered in your research, this type of training is the type generally recommended for your goal. With the more limited time under tension, your body will lean away from physiological change that results in muscle mass gain and will instead promote to a greater extent a neuromuscular change that increases maximum force output. After this style of training for a while, the neuromuscular changes will diminish and instead another sort of physiological change will become more prevalent, but this change isn't so much more muscle, as it is the change in the composition of the muscle cell itself, again geared towards the ability to generate force over a period of time.
Sounds like your cup of tea to me.
Have you tried this particular protocol for training? How did it go progress wise?