NEED HELP WITH MY FORM URGENT (COMPLICATED SHAPE (?))

[guidoperez]

Hello, 
I am making a concept of a hair dryer using the form tool, however I've been having a lot of trouble trying to solve some problems I have. First:

I've been trying to make that part as round as possible, however, I just can't because it gives me a lot of errors about "overlapping" when anything is actually overlapping (I had a problem before, posted on the forum about this problem). Also, the other circules are parts that, I don't know why, like the material "broke" and I've been trying to solve that with the smooth tool, and a lot of other things and I just get the overlapping error. 

Another problem I have is this:

that is the interior of the dryer, it is cut by half, I just want to take that part to the other end (but not leaving that much space) so I can add an internal structure (internal ribbing) so it can hold the internal components, but I just can't I'ts been a headache. I leave the documment here, if you can help me solve those problems, by text or document I completely appreciate you for taking you time on helping me. I will keep trying while waiting for an answer.

Thank you!

[TrippyLighting]

I am not sure what you are trying to accomplish and why you decided to created this object using T-Splines.

Even if you stick with T-Splines, this design violates a number of T-Spline modeling guidelines, particularly #4 - Ngons.

1. Model 80% in box view mode. The shape should somewhat resemble the desired, smooth end result. Make small adjustments in smooth-view mode. Check back in box view mode to make sure the model still has integrity. Faces should not intersect in box view mode!

2. Do not add detail until you are 100% satisfied with the overall shape and proportions of the shape. The more detail you add the more geometry you have to manipulate, usually resulting in a lot more work than necessary.

3. Avoid tringles at all cost until you are at least at an intermediate level with T-Spline modeling. Triangles are best avoided altogether.

4. Limit the use of N-gons (polygons with more than 4 edges/vertices) to the bare minimum. No N-gons with more than 5 edges vertices. 

5. Start with as little geometry as you can get away with. Add more as needed. If you find that you need to stretch polygons too much to get a desired smooth shape, then you need more edge loops/polygons.

[guidoperez]

I tried to avoid/limit the use of N-gons (because I saw a lot of tutorials about the form tools and all said that I have to avoid them) but at the moment of confirming the form I had a lot of errors and used the auto-repair tool, that, at the end made more problems. I did this using T-Splines because this is a very curvy object, and didn't know how to accomplish such smooth curves with other tools. Also thought about making a cylinder, use the tunneling tool and just model on top of the cylinder but I don't know how can I get that shape, be able to add internal components (because it is a Hairdryer) and the internal structure using other tools.