Access to Swap-Buffers

I am porting the H3viewer to jogl. It renders large amounts of geometry and allows fast user interaction by only rendering what it can in a given time but after the user event is handled it finishes the rendering. Only being able to swap buffers by letting display return is a pain because the rendering is not done. Shure it can be done but i will not be pritty.
Thoughts about making manual swap buffers available?

See:

http://www.java-gaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=jogl;action=display;num=1063385846

Kev