Articles, luthier, are like any other form of written communication. They need a beginning, a middle and an end. The beginning says what you're going to say. The middle says it, and the end rounds the story out and concludes it. In other words you need to tell an interesting story that leads the reader through and keeps their attention from beginning to end.
An element that matters greatly to magazine editors is good quality images, particularly photographs which need to be well lit with white and colour balancing requirements carefully thought of. I use a high quality 20+ year old 35 mm format SLR camera with interchangeable lenses and the ability to go fully manual for complete control. Prints go on gloss 150 mm X 100 paper which suits magazine needs well.
Nowadays I'm also working in the digital format and here the same basic rules of photography apply, but there are other essentials to be aware of: your camera needs to be at its highest recording resolution and quality settings. Prints from digital images works best from 300 DPI images at 1600 pixels or above on the long edge settings. Original full size digital images should be stored on your file untinkered with so that the magazine can do their own fiddling, but images you adjust for illustrating your article can be fiddled with for size, colour balance, etc. Your images looked good on my monitor at this end so you've probably got the photography thing mostly nailed.
It's always helpful to magazine editors and their readership if you have good images of the piece being made, and I know from experience that lighting workshop situations for photography can be tricky. I use lots of slave flashes and things like reflective umbrellas and tricks such as bouncing the flash off white surfaces to disperse the light to reduce harsh shadows. Lots of lights I find will overpower the green cast that fluorescent tubes give to traditional print images, and you can use a slower film with smaller aperture settings and faster shutter speeds which gives greater field depth, reduced film noise and better quality images.
That'll do for now. Slainte.