the bird must be in the loft when timed, a sputnik, if you have the antenna fixed under the floor the bird drops into the sputnik and times, the bird is timed in the loft, one rule which is rule 4, timing systems must be fitted within the loft, is confusing as rule 11 says ETS can only record the arrival time after the pigeon has entered the loft, I think the latter fits the rule, its the bird which must be in the loft when timed, as said above using a sputnik, would be ok, as the bird is in the loft when timed,