Manwithabook - pan production increases by 2^(1/28) with each pan, so 28 of them will double, but you see that increase gradually. Also, for sluice box, just read the text. It means exactly what it says.
My Suggestions
(1) Make it so that only the top level on each piece of equipment is visible. Seriously, I'm never going to equip a weaker version
(2) Make the researches come at more predictable intervals... the jump to 160 is just odd... why not 150? Also, many researches are WAY overpriced.
(3) Make save exporting available during challenges
(4) A way to see shard-bought-bonuses while in a challenge; maybe inside the "game stats" or "info"
(5) Give us a way to one-click buy skills and researches. Also, buy-multiple option on buildings
(6) Gold Pans are underpowered. Massively underpowered. Their exponential nature should make them more attractive the further you get in the game, but even in the Qi range they suck
Atombender, but they are tripling the production of ALL of your buildings, so 2/3 of that GPS from the Mines is due to the Pits. That's... pretty darn good!
Gamejoker - that's correct. You can see the number harvested in "Fields" and the max capacity in "Store"
jcruskell - I gave up after 95... the price of the 100th was just too high!
jcruskell - as far as I am aware, there isn't one. I've never gone beyond 85, but I'm at a convenient spot to extend a run and see if it goes to 100. Will let you know in a day or two
Catank - there is an x5 button. It's the one that says... uh... "x5." There should be an x10, because that's where the bonuses are, but seeing as how the game has not been updated in 4 months, I think we're stuck with it as is.
You like working for free? Cause I enjoy feeding my family.