Hi Martin, well not necessarily, depending on what you want to do next...

If you are already satisfied with how your model turned out with the patchwork method then that could be ok to keep it as-is.

But you mentioned filleting in particular - you could run into difficulties doing filleting with that current model. I'm not really sure which particular areas of the model you plan to fillet though, could you maybe give some more specific information on what the next steps are that you were planning to do with it?

Just in general vehicle modeling is one of the more challenging and advanced types of projects to undertake, by the way.

- Michael