RE: Alchohol stoves - from the backpacking world, there are a number of small, homemade, denatured-alchy burning stoves which have considerable output of heat, and use diminutive resources to attain it. The design principle is basically:

A burner/fuel reservoir, made of the bottom of two soft drink or beer cans, using a pair of scissors and a needle to fabricate the burner. The bottom 1/2 inch or so of both cans is cut off with scissors. In one of these pieces, a number of very small holes (30 or so) are made with the needle, spaced equidistant around the outer edge. A few more not-quite-as-small holes are made in the middle of the bowl-shape of the can bottom - these are for fuel filling. On this same can piece, the former can-wall is then snipped vertically in perhaps 6 evenly spaced places, to allow this piece to be slid into the other. Inserting this piece into the other completes construction.

This reservoir is filled with alchohol, and ignited. The resultant heat soon boils the alchy within, and, when the rush of escaping vapors from the boil ignite, the small pinholes act as jets. A most satisfactory blue flame is achieved within a minute or so of ignition.

There is no on/off switch with this type of stove, it is either stopped, or full-ahead. However, you can vary cook-times by increasing or decreasing the size of your burner/reservoir, and make a few of them, each of which can be used on a task-specific basis (for example, I have a "coffee" burner, and a seperate "food cooking" burner). They are so simple and quick to make, experimentation to achieve just the right amount of burn-time for a particular task is easy.

Use Google and do a search for "KISS Stove" - there is a page which has many different designs people have engineered, almost all with instructions and particulars about what the designer was trying to achieve with their variant.

If you found these burners to be efficient enough to be adopted, this would allow one to make their own perfectly sized gimbal, into which an appropriately sized burner was dropped when food or drink needed preparing.