LT1054 charge pump for non-standard voltages?

[parmalee]

I'm needing a unipolar voltage of between 12v and 15v, from which a 9v wall wart will be the power source.  I'm familiar with a number a ways of achieving this, but they all involve a fair number of components--or a component I do not have.

I've found that by using a LT1054 in an atypical configuration will yield roughly--and reliably--13.5v, BUT I am wondering if this configuration should prove problematic in the long run for any particular reasons.

So here's my circuit:




The caps are 10u.

Any foreseeable complications?