What is a sensible limit on time out in php.ini

Mine was set to 30 seconds, but have had to increae this to 120 seconds for the subscriptions not to timeout in threads.

Is this still within a reasonable range?

Probably. You could also leave it at 30 in php.ini, but increase it only within subscriptions.php:

ini_set('max_execution_time', '120');

Thanks Dave - didn't realise I could set it in the php file

Yes, a lot of the parameters in php.ini can also be set in httpd.conf, in an .htaccess file, or with the ini_set function. Details here.

Maybe yuo should change position: max upload: 2MB to another... for ex. 10MB