I watched the 75 Worlds as well a while back, and certainly the impression is that they flew the maneuvers quite a bit tighter than you would think.  Hard to get all the perspective from the video, but I think it certainly looks likely.  I think what you want to do is recognize that in the age of 2 meter pattern and limitless power we are influenced to make the maneuvers far larger than really works for these planes.  I would work on sizing them so that your power and speed are constant.  When they get too big they lag over the top and I think that hurts their appearance, and makes the execution so much more difficult.  A wallowing plane requires tons more input to stay steady than one moving well under power.  I wouldn't necessarily decide to cut yours in half or aim at a certain size measured by feet, I would work to size them so that your plane has good power and tracks well all the way around the circumference, and you can use your throttle to maintain a constant speed.  Constant speed, in my opinion has the most influence on how precise and graceful a maneuver looks, not the amount of speed.  I think that is why 4 stroke powered planes seem to look smoother at times.  I don't think it's because they are slower, it's because their power curve allows for a more consistently paced maneuver.  For me, I wouldn't want an elevator rate that allows me to pull the stick all the way back.   I do that on my three rolls, I think that makes the pace consistent in almost any conditions, but I don't on my elevator for loops.  Logic would say that it would make them round and all the radius consistent, buy in my experience that doesn't translate to round, consistent loops.  Wind affects loops differently than it affects rolls, and being able to control your geometry on a loop in a windy situation doesn't work with just a constant input from the elevator.  <div>
</div><div>Mostly, just go work with them, in specific the sizing, to make them round, centered and constant.  Whatever size the maneuver needs to be to accomplish that, that's what you want.  As you stated, there is a high likelihood that the best size is smaller than what you would think.</div><div>
</div><div>LIndy</div>