I'm assuming the graphic designer is going to be building the ad, and this is just your rough example?
Immediate opinion - The placement of the photos and text is a mess. Most of the real estate is taken up by a spur, and some rocks (albeit some nice rocks). And it looks crammed. Think about the concept of space in music, the same goes for design.
You need an overall (front/angled) shot of the kit, like almost every other drum ad. That should be the point of focus in the center of the page. I would go with a nice shot of the kit, and one
small close up of the hoop/lug showing your fancy new innovation. The layout of a graphic design is critical. Looking at your image, my eyes don't know where to look, and even after studying it for a while I'm not sure what I saw. To someone who knows nothing about Guru, this just looks like yet another ad for some drums. Anyone actually interested can easily check out the website, but first you need to spark their interest.
I think you also should think up some more clever/catchy wording. The blurb you have does not scream "these drums are the best thing your sorry eardrums will ever have the privilege of hearing, they sound and look f***ing beautiful, buy me". Put yourself in the mindset of someone 'cool'. How would Elvis describe the drums? Johnny Cash? John Lennon? Buddy Rich even? Would they be getting excited over the aluminium hardware? I don't think so... You can put details about undrilled shells, aluminium hardware, etc, in smaller print near the bottom which will entice those who actually care or understand the significance.
I would think the Guru name needs to be more prominent, but if the Guru logo is actually on the kick head then nevermind. To me it looks like Origin is the brand name.
Put "Made in (town), England" somewhere. I like the demonstration line, but with a location I would expect more interest, someone seeing it might think "hey that's just up the road..."
Hope this helped - hope I wasn't too harsh