New one for me that Les. All the drill stirrers I ever tried introduced air and you ended up with a layer of froth in each jar. But if they are advertising one that doesn't introduce air, well worth trying as much less labour intensive than using a potato masher.......Now I have my creaming machine I'm a contented bunny.
As I see it your biggest problem in the "tropics" is going to be heat. It is very difficult to make good soft set when it's too warm. Even in the temperate UK I need to make a years supply during our winter, any of the stuff I make in the summer is just not as good.
I've a batch brewing at the moment. In my bee shed its a round 2-3C but the friction created by the crystals rubbing over each other makes the mixture around 18C, which is fine. In the summer this temperature gets over 24-25C and it just won't set as fine...it "soft sets" but it's a coarser set. Which might not matter too much in the long run....depends how much of a perfectionist you are