Option for pre-heated mash tun in Mash Infusion Calculator

[jlongstreet]

NOTE: The strike calculator assumes your tun will absorb heat (a few degrees will be absorbed by the mash tun, this varies widely by the type of mash tun). Even if you 'pre-heat' the tun with a little boiling water, this may still be the case. Do not stabilize the tun at the strike temperature, and then add grains, or you will overshoot.

This is nice, but I've found it easier and more accurate for me to preheat my tun with some boiling water, add strike water, get it to the correct strike temperature, and then add grist. Since I don't know what specific heat the calculator is assuming my mash tun has, I can't really adjust for it, either. It would be nice to have a checkbox or something to assume a 0 cal/g-deg C specific heat (or a field to enter the specific heat).