Glad you clarified, because I thought you meant something else!
Extensions shouldn't be hard at all... IF they do the prep correctly. It has to go up and come down! If they can't take it up and set it down, then they don't need to do an extension. If they can take it up, then they are already doing extensions and don't realize it. It's a matter of pushing through your shoulders and holding.
The biggest tip for the flyer on press extensions is to keep her ankles squeezing in and to lift up. No balancing, just lifting and squeezing.
The biggest issues we have with our bases when first learning is that they let their shoulders relax and the stunt gets wide. They need to squeeze their arms to their ears and shrug up through their back and shoulders. Make sure they are using legs and then locking out arms fast. Backs just need to help control and lift. It is no different for them than a normal extension.
Make sure they know speed is their friend. If the press at a grandma pace it won't work. I tell them to think of it as the longer it takes to get there, the more time there is for something to go wrong. If they get their quick then there isn't time for all those little things to effect it. Give them a start and end count. If they don't end on that count then they are going to slow!
