With the help of the StoreGate folks we were able to adjust our WebDav client to be compatible with this service as well. SharpBox 1.1 will support StoreGate as a supported cloud storage provider as well. I personally like the performance of the StoreGate system, it's very fast when you up- or download many files, outstanding.
Thanks to the StoreGate product management team who supports me during the adaption period.