Well I'm still not convinced that altitude has any real bearing, since the lower boil points and the less fuel used to reach them seem to offset each other proportionately. Of course unless I go climb a mountain, I'd never be able to prove it. Barometric pressure might play a larger role, and if I had a barometer, I'd use it, maybe someday, but not today, sorry.
I won't be weighing my alcohol, since I feel a 1% variation is acceptable, and easily attainable with a simple 5 ml oral medicine dropper. I do weigh my water, and I don't think that's expecting too much from anyone on this forum, since owning a scale is practically a prerequisite to being here ;)
I like simple, keeps more people interested. Eyes tend to glaze over if things get too technical and it's just no fun anymore. Which is why I simplified Bens original spreadsheet in the first place, and to eliminate conversion errors like David mentioned. I did the same thing initially, now, no more.
I'm certainly not against more data, but I think the point of diminishing returns has been reached. Piling more data on at this point would change outcomes by what? a couple percent max? Probably not much more than boil to boil variations from crude fuel mixtures anyway.
Delmar originally suggested posting all pertinent data, not just efficiency reading outputs. I agree'd then and I still do. Anyone can then use either the "basic" calculation, or the "advanced" model to reach their desired conclusions. Meanwhile, the individual user can get good relative comparisons using whichever model they feel comfortable with to better improve his/her designs.
To this end, I feel there should be only 2 worksheets, the basic, and the advanced. We have the basic, and it should be left alone. The advanced can always be improved upon for those so inclined to push the envelope further, factoring in barometric pressure, elevation, humidy, etc. Whatever our engineering friends would happen to bestow upon us by way of formulation. The advanced worksheet can continue to grow, while the basic remains the foundation of the project. That's my 2 cents anyway.
I would also like to add that I'm under no delusion that any of us are breaking any new ground here. This has all been done before, ad nauseam. But proper understanding comes from a bit of self discovery, so there's only so many shoulders of giants we can stand on if we want a deeper learning for ourselves. I guess I think of it as a chemistry kit as a kid growing up. Nothing new, just fun to learn. :)