if you think the predator is too bendy, make sure you never try an extender pole!
or an unger!
For a fibre glass pole, the rigidity in the predator is the best I have seen so far.
If you used the 36ft powerpole (6ft x 6ft) you could make an extremely rigid 24ft pole by taking out the top 2 sections and using a collett adaptor to attach your brush head to the 3rd section. Usually, a powerpole brush head can only be connected to the 1st or 2nd section but these can be whippy with the weighty brush head attached. So you can purchase an adaptor from Powerpole which allows you to fit the brush to the 3rd or 4th section making it extremely rigid.