Hey Fred,
Thanks for getting in touch – I’ll help you getting this right!
TO modify RSVP tickets default and max quantities you’ll need to create a template override (as described in our themer’s guide) for the RSVP tickets form. The file is located at wp-content/plugins/event-tickets/src/views/tickets/rsvp.php, copy it over to wp-content/themes/active_theme/tribe-events/tickets/rsvp.php and once the copy is in place edit line 53:
<input type="number" class="tribe-ticket-quantity" min="0" max="<?php echo esc_attr( $ticket->remaining() ); ?>" name="quantity_<?php echo absint( $ticket->ID ); ?>" value="0">
Change the min, max and (default) value attributes to fit your needs 🙂
Best,
Nico