You know there is actually some conflicts over what some say is best placement for a loop, I think AMB originally stated to put it in a slower speed section, but then later it was stated by some you get cleaner hits in a higher speed section, at out track you come round the final corner and gas it over the loop just after the corner, so maybe medium speed situation I guess.

Yeah in an electric car it's just going to show you the BEC voltage, though it would be interesting seeing how constant it is depending on where the loop is.

If it's nitro just out of the receiver should be fine, you should still get an accurate voltage, running it directly off the battery would generally be interesting in electric, but then my Sanwa already can do that, but still interesting if you say get a voltage log from the transponder data info.

Keep in mind that operating range is just the recommended optimum range, I believe it's stated somewhere it will operate above and below that, but give a warning flash, my guess is it could still work down to 2v or so.