Sure, Dragonfire.
1. Make a Back up.
2. Open the python document "bbeans" in the 'Arenas' folder.
3. Starting on line 47 (or just look for and) find this section:
if self.wallmaster == 370:
self.retractsound = plus.createSound("Sounds/liftmotor.wav", False, (0, 0, 0))
plus.playSound(self.retractsound)
if self.wallmaster > 370 and self.wallmaster < 390:
self.SetPinned ("bladewall", False)
self.prism.Lock(False)
self.prism.ApplyForce(50)
4. Just increase/decrease all of the highlighted timer numbers above, keeping in mind that the "370" is when the wall begins to descend, and "390" is the when it stops. So as you add/reduce the times keep the difference between them 20.
If you need help more help just say so.