A plea for clarity...

Greetings, fellow Imagesmiths...
I've been a long time follower of this particular forum and have a great deal of admiration and respect for the hard working artists whose works frequent this blog... but I've never bothered to jump into the tidepool myself.

While most of my cartooning work has been in the field of children's publishing in the past, I do some independant comic work for Heavy Metal Magazine (I know, I know... CRINGE... but it's the only large circulation venue I've found that doesn't feel the need to over-edit my work) to salve my creative itch. I've been documenting the progress of my latest story on my blog:

Slumbering Giant

I figure that this is as fine a place and as good a time as any to address one of my biggest obstacles to productive comic work...
More and more, I find myself constantly revising and redrawing past story pages in order to make what I feel to be substandard imagery jive more readily with more recent and perceptibly improved page work. Because of this, I'm finding that I could potentially catch myself in a sort of creative mobius loop of continual refinement with no hope of an eventual finished product.

How do the more productive among you comfortably justify preserving previous progress even in the light of current scrutiny? Is there some easier way to simply allow oneself to just "do better next time" in the interest of simply finishing a story?

Thanks for any insights anyone can provide...
In the meantime, I'm grateful to be counted among you in the struggle!

Drawing forever!!

I noticed the blog hadn't been updated in awhile so I thought I'd take the opportunity to submit a post.
I can report the good news that I got to the bottom of what was causing my wrist pains and it ended up being an irritated nerve in my neck. I still have the occasional ache but as long as I keep up my stretches I can manage it ok, and more importantly keep drawing!
I mostly post comics to my blog if you're interested.