Hi John, so if you have a kind of irregular outline that you want to surface, like one that seems to be kind of suddenly interrupted like at this spot here:



That can be an indication that you should try to build a broader more extended shape and then trim that shape by some side profile curves to arrive at that final outline rather than trying to build a surface directly to it initially.

So in your case here that might be something like build 3 curves like this:



Then Loft those to make a surface:




Then get some profile curves from the front side:




And use those to make holes in the extended full surface:




This general concept of building an extended piece and trimming it back can help in quite a few difficult surface construction situations. It can take a little while before it becomes natural to think about it, because it is easy to fall into a tendency of trying to surface everything directly right in the first construction. But surface creation works best with a more regular and kind of non-interrupted curve layout.

3DM model file also attached.

Hope this helps! If that's not the right kind of result that you need could you post an image reference of how it is supposed to be shaped?

- Michael