Hi Kevin,

> Problem 1. Pinching of the surface behind the cockpit.

It looks like you've built the center piece trying to make single surface match a somewhat irregular outline with a sudden change in shape near the top where it flares out.

I would recommend building a more simple tubular shape and building the flare-out part as another surface with a separate construction.

It tends to get hard to control single surface constructions if you try to build them to irregular outlines and incorporate sudden shifts directly within a single surface - try to break things like this up into more component pieces rather than doing them all at once.

It's also not unusual for pieces that are built as "separate patches" to have pinching or creases where they meet up with one another. There is some previous discussion and illustration of why that happens here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1398.18
http://moi3d.com/forum/index.php?webtag=MOI&msg=1398.19


Usually the easiest way to avoid that problem is to build things as larger pieces.

Again, the main idea is to build single large sheets that are as simple as possible and then trim them to make more complex outlines.

So for your case here, I would probably try to make one longer streamlined tube initially and then cut a piece out for the canopy, rather than trying to incorporate the opening for the canopy directly into your initial surfaces.



> Problem 2. Cant join the surfaces created together which I need
> to do to create a good mesh when exporting out to my
> polymodelling software.

Typically that means that they do not have edges that are close enough.

You can see this in this case if you zoom in:





Again probably the easiest way to solve this is to have a larger single simple tube as a starting piece rather than a separated patchwork.

- Michael