Seems to work but my model is still to big.

Even I get the following message
The home data length (3.3 MB) is larger than the maximum length accepted by the server (3 MB).
Delete some furniture and/or background images to reduce the length of saved data.

the model will be loaded but can't be stored. Anyway, it is pretty cool that a 16.8 MB model can be reduced to 3.3 MB!

Maybe a FTP support will be an option?

SH3D Online loads data from a foreign FTP url?

--hfrmobile