Having expanded the theme to cover more of the expanse of present LCD resolutions, the form was right.
However, thanks to a timely user comment, I realized that readability had suffered by having the lines of text in the posts themselves containing too many characters – the average person being able to quickly scan only 60-70 characters without extra movement. Since I usually read the posts in the blog interface word processor, I didn’t notice this right off.
I bit the bullet and reverted to my original desire, on the back burner because it was too much work – widening via a second sidebar on the left rather than just wider textual area. some judicious forum searching turned up someone else with more the solution (there is nothing new under the sun, as usual).
So, there you have it, post readability retained yet screen usage increased!
This also means that more of the sidebar material is visible without excessive scrolling, so more of it may actually be seen.
Lastly, it has always annoyed me that when viewing a single post in old theme the sidebars were not displayed. To me this was shortsighted design, limiting the reader’s navigation options when leaving the page. This has now been remedied.
Now to convert my other blog to this format…