I don't know if this will help any, but I feel like writing, and I had a similar situation recently. We needed promo recordings for a tribute band I'm in. I agreed to contribute as I knew it was necessary. We had a good studio deal with a friend, and it was only costing us a couple of hundred each. Maybe even less. Anyhow, BL and singer decide they want to make this into an all out packaged CD, with lots of editing time, lots of overdubs, mastering, artwork, pictures, packaging, etc. This was NOT original material, and NOT covers we were doing our own way. The goal for them was to rerecord tunes as close to the original recordings as possible. This was one of those rare times I knew beyond the shadow of any doubt that there was absolutely 0 chance of me contributing to anything like that. Because of that I was able to say quite confidently that I wouldn't do it. It was pretty clear that there was no way I could be talked into it, also. The drummer felt the same. BL and singer wanted it badly enough that they somehow scraped together the coin to make it happen. I honestly don't know how it even happened. Strange thing is, much to my surprise, they actually sell these CDs. People actually buy them (I have some theories as to why). They haven't made their investment back yet, but they're good for an average of 5 sales per gig, which confounds me.
My point I realize is a little lost in there... so... I'll put it this way. If you decide you're not going to contribute it doesn't necessarily mean it won't get done. What's caused me problems in the past is my being on the fence about things. When people think there's the possibility of me doing something, when I'm unsure or unclear... problems start. Almost always, or at least when I ultimately decide "no". Could be because the people involved get psyched to do it and then feel it's my fault it's not getting done, or they know I "can" do it and ultimately decide I'm not. Whatever the reason, I've learned and practiced to keep my mouth shut until I firmly decide one way or another.
I know this is turning into a novel, but it kicked up another thought regarding being completely decided on something. I don't drink alcohol. Haven't in a long long time. I get offered drinks as much as the next guy. When I do, I simply say, "no thanks," and that's the end of the story. I encounter lots of people however who decide to quit drinking, and have to fight people regularly to no accept a drink. I am certain that comes down to the amount of conviction and comfort one has in simply ssaying no, with no emotion attached to it. When someone is on the fence people pick up on that, and try their best to have you do things they way THEY'D like you to do them. My experience, anyhow.
Oh yeah... that CD I refused to have any part of after the one 4 hour recording session we had. Not my proudest work, but I'm happy it exists.
[Invalid or Expired Link Removed]