I hereby present to you ...
The Helmet From Hell !
I had bought a kit in good faith on eBay, from a seller in the UK. I had laid my bid only a couple of days before Wakal outed German guy BOBATAFF here on the RPF as a recaster of his (Dreadnaught Industries') helmet kits. Only after I got it did I deduce the original source.
The kit was crap. The shells were of very thin styrene (not 3mm thick ABS as advertised), the details were very soft and most of the edges were warped. There were numerous casting artifacts: pits and warts - the mold had obviously not been touched up in any way after it had been made.
The kit could not be glued together as-is. Not only was the mohawk edges too warped for the styrene strip, the supplied strip was 1/2" too narrow compared to the front endcap.
The supplied decals were a joke. They were of very low resolution, each pixel being more than 1 mm big, and had
dithered colors. He must have browsed to some web page using a 16-color screen mode and hit PrintScreen!
No other parts were included, that could have been screwed up ..

I have since then warned people about this guy almost every time I see a new forum thread about X-wing helmets.
I decided to build it up anyway, in parallel to a fiberglass helmet that was originally intended as my main project. I was unemployed at the time, so I couldn't justify to myself buying a new kit, but I did have much extra time.
The first step was reshaping details using heat. I used a candle to soften an area and then bending it by hand. I pushed in soft edges using a chisel and a soldering iron. I also pushed in the rivets/bumps on the sides of the head. I couldn't make sense of the two "sausages" that should start at the neck-end of the mohawk and go forwards along the edges, so I decided to also flatten these.
The second step was fiberglassing the inside of each side piece to stiffen it up, so that I could work on the surface without it flexing. I also did a couple of custom mods:
I filled with auto body filled underneath the "rams horns" to make them more screen-accurate. I resculpt the facemask-mounts to be more accurate to the ones on an APH-6. I also modified the "sideburns" to have one slightly curved and the other slightly fatter, as on the screen-used helmets.
This pic was taken about half-way during this step:
I cut down the height of the mohawk, glued on the styrene strip and then fiberglassed the inside of the mohawk. Only after this step did I cut the neck end of the mohawk (it ended too far back in DI's sculpt) and glued on a trapezoidal piece of styrene. Then I fiberglassed the inside of the mohawk's back end.
Because I had removed the "sausages", I decided to replace it with a real piece of thick edge trim as on a real APH-6 helmet, and for this I had to sculpt a channel for it to go through.
Now I noticed that the two halves were not identical mirror-images of eachother (sigh...) and I had to resculpt the brow rim. I glued a piece of styrene in place completing the rim and filed/sculpted the edge straight.
I sculpt a new mohawk cap, only using a few parts of the old one.
When the weather got nice enough, back in the end of May, it was time to start painting it. Now I
did have a job and not much free time before my first planned Rebel Legion event as pilot in June, so I stressed a lot during the paint job, laid it on too thick at times and had to redo several steps.
I got my helmet ready just right on time (got my costume approved the night before the event! :lol), and this is how it looks today:
None of the "weathering" is intentional - those are effects of my poor paintjob. :$
The rubber edge trim is a square profile, except at the neck where there is thick foam trim. I decided to put the edge trim on the inside of the facemask mounts as an APH-6 instead of on the outside.
The chin strap is yet only duct taped to the inside until I decide where to attach it.
I made the rim for an inner helmet by heat-shaping a piece of styrene. (Of course, it snapped at a point, so I had mend it)
I plan to redo the padding and make a fabric liner which should hide the interior's ugliness.
The mic-tip is a resin-cast from Richies Armor. The boom is from a scrapped computer headset - it is on a ball-joint, so it is very adjustable. I plan to put some grey heat-shrink and a pen cap on it to make it more accurate to a Amplivox headset.
I cut a piece from a "boom box"'s speaker grille and put it inside the mohawk cap.
Edit: After some further mods, a visor, decals, and weathering:
It was difficult to put on because it was too narrow, so I added a lip, as on the original helmets:
Mic on the headset boom and swivel:
Moving visor: T-strip of styrene sliding on a bracket. Velcro so that I could adjust the cushions. Also more work on getting the inside surface smoother and painted.