So what Steve was pointing out was using the network tool, has no mechanism for maintaining the tangency to surrounding surfaces...

So here if I broke this edge here to enable a blend at a much higher value in this upper area:



To look like this... I might try to fill in this last area with a network:



So I could select these curves and run network on them:



And I would get a nice surface patch in there:



But at the moment, MoI doesnt have a means for the network patch command to "Know about the surfaces next to it"... So you can get a lack of tangency from the surface previously made. You can see the hard edge here now..



So, building by "Patchwork" would be fairly hard or advanced as michael mentioned....