API Modification Request to support large uploads

We are creating an integration using your API to upload large video files to mutual customer accounts.  While the Box API is pretty straightforward we are having some issues with larger files.  We are wondering if it is possible for your API to be modified to make some accommodations for large file handling:

1. We Need the possibility to control the size of a file chunk. Right now the Box API suggests the size of a file chunk. There is currently not a way to control the size of a file chunk.  When uploading a large file ( ~16GB ) we faced an issue when a large file was chunked into fairly large parts (several Megabytes each). Our environment has a limitation on data stored in memory or transmitted from step to step (it should not exceed 1 MB). We need to have the capability to control the chunk size or the number of chunks if possible.
   
   

• When committing the upload session, per the Box API, we need to supply the "digest" of an entire file. Again, when dealing with larger files (i.e ~16GB) the operation to generate this digest takes so much time that our internal infrastructure results with a time out. Is there any way to bypass this whole file digest part?