I've been working out at the local gym where I live for about half a year now. Since my town (if one can even call it that) is pretty small, the gym is too. There aren't a lot of people and therefore not a lot of machines/weights, but that's no problem, I never had to wait for anything. But since the gym is relatively small, aside from the owner there are no other trainers.
For the last 6 months I used the training plan the owner provided me (which was free). But after a lot of research myself, including books, websites and forums, I think the plan is highly unbalanced. I came up with a better, more balanced and less intense plan (since I'm only working out for half a year) and tried to talk to him about the topic. He immediately rejected my statement of his plan being unbalanced, and told me I should follow his plan. I'll see I'll make gains, he said. Sure, I might make some gains, but for what cost?
I don't want to just follow my own plan behind his back, because that might upset him. Because of his age he's pretty old fashioned, he also seems relatively stubborn. I don't want to upset him in any way, because, except for the provided plan, his advice always helped me. He also told me, if I'd change my plan it's on my own risk - I shouldn't come crying if I hurt myself with my own plan.
How can I use my own training plan without upsetting him and being able to receive future advice if needed?