After saving a new record with the Custom Table Form web part, the Id of the newly created record is added to to the querystring of the page.
You could use this querystring paramter to redirect to another page: create a javascript webpart with redirect code in it and use a macro in the visibility property of that web part to be only visible when the querystring param is prerent.
Another way is to extend the Custom Table Form web part to do the redirect from code. See CMSModules\CustomTables\Controls\CustomTableForm.ascx.cs
Regards, Felix