[QUOTE=abdon;11175819]I'm not that concerned about the overlapping; most of the time shifting combos to achieve some sort of linear shifting are too complicated to be practical.
--agree completely, thats why I never wanted to go the half step, once in a while it doesnt bother me to "go down to middle, and up 2" to get an inbetween,but I know what you mean.

My desire to change boils down to a single fact; While cruising I keep shifting between two gears, never finding the sweet spot.
---I hear you, I guess the main thing about this exercise is that its good to use and understand gearing charts to figure out what is best for your riding style. I know I am not a particularly strong rider, being slight, so the higher up gears dont get used that much, except of course with good tailwinds and downhills, so for me a tighter spread would be really more useful in the middle range of gearing.

Its probably always a compromise somewhere, with a bigger jump going to always somewhere with larger range cassettes, but even seeing your calculations makes me think more about the ratios and diff in ratios on my new bike, will look more closely at it with your "percentage" diff from one to another in mind (good way actually, to see the % of jumps, and to think of where one personally would want more closley spaced gears--within the limitations of the number of gears, the derailleur, what total range you would like in your bike given the biking terrain, load on your bike etc etc.

all the best getting the custom one done.
cheers