Hi. I’ve made a small tool that is setting the selected edges length to the same value.
The source code is here:
Select edges that you want to make equal and use the space bar menu to call one of three operators:
Equalize edges length to average
Equalize edges length to longest
Equalize edges length to shortest
After that you can use scale parameter to further resize the results.
Comments and critics are welcome.
PS. If this addon will prove useful I’ll try to submit it to the Blender release.