Setting php_admin_value or php_admin_flag for php-fpm instances

Hello,

I'm wondering if it's possible to set the php_admin_value or php_admin_flag for php-fpm instances setup by InterWorx. I know you can put php_admin_value[memory_limit] = 512M in the php-fpm process config, but this is overwritten when InterWorx writes the config files again. I also know you can use ~iworx/bin/config.pex to configure specific php-fpm instances (as ~iworx/bin/config.pex --siteworx example.com --set --name FPM_MAX_CHILDREN --value 8), but I don't see an option to set php_admin_* values.

Any ideas?

Thanks