Help required to convert from Aspose.Slides to Aspose.slides.PPTX

I am from Nielsen company, in our application we are using Aspose.Slides v4.0 to support PPT export. Now we have planned to support PPTX format, to do that we started exploring Aspose.Slides.PPTX namespace. We found that there are some methods are not available in some of the classes which we are using it for PPT.

Our requirement is to export the reports (tables, charts etc) in to the presentation (PPTX) based on the master view setup which we read it from another PPTX file. Please let me know is there is any documentation which will be helpfulll to implement the above requirement using PPTX namespace.

Some of the methods which we are using in Aspose.Slides namespace but not available in Aspose.Slides.PPTX namespace.

CLASS: PresentationEX

Missing/Modified Methods
=======================
CloneSlide
GetSlideByID
DeleteUnusedMasters
GetSlideByPosition
LastSlidePosition
AddEmptySlide

Missing property
================
Fonts


CLASS: Slide

Missing Methods
===============
ChangeMaster
AddTable

Missing Class
==============
Pictures