i have read all the posts on this ,and its obvious theres a problem getting age on our doos. i have raced doos for 38years now,and not a lot of progress has been made regarding the transpot side of things.i can remember loading the fife fed motor,as far back as 70's (we had 3 at that time ,and only lanarkshire was bigger birdage in scotland) and it was so warm the sweat was running down my back,it was that warm in the motor.so i really dont think a bit of perspex on the roof is the problem. the clocking of the doos has improved since i came in to this sport,stb's t3's ets. the doo crib....if it works then its right. we all train our own doos in different cars,vans,trailers etc from years ago, lots of cars have air conditioning do these fanciers get great training with there doos....i doubt it. the variables we cant control are raptors and the weather. the raptor problem is responsible for more fanciers packing up than ets or pigeon politics will ever be. think about the weather ,we have times in the doo season that in a 12hr period we have had rain,wind,brilliant sunshine and heavy cloud in a space of 50mls. jmo