Hi, Emma Zigan from Dilworth School in NZ here. Take a look at our Take Your Seat In Our Future (Chapel Chair Campaign) on http://www.takeyourseat.nz that we are currently running. Very similar conditions to what you are asking about. We are using our Potentiality database for payments. We are not giving choice of the placement of the chairs, as our seats are all the same price and are movable.
Feel free to reach out directly to us for more infos if wanted on advancement@dilworth.org.nz.
Cheers
EZ