what you could also do is take goa express uotp bhusawal and switch over to pushpak at bhusawal. its about a 3 hr wait. you will have to change the boarding point from CST to bhusawal. No refund will be provided for changing the boarding point. However if you do not notify railways about the change in boarding point, they may take you for no show and assign your seats/ berths to someone else for good