30 August 2014 at 10:49pm
In this case you don't need to muck with the $url_handlers. You're correct the form action will go directly back to the Form action (so you must have 'myCustomForm' as an allowed action and not rely on anything else to return the form object). The actual form action is called by Form::httpSubmission() based on what is in the REQUEST data.
If you paste your whole code example I might be able to help a little bit more.