Its the right way round. Motor is in the front for the DB chassis and you can see the cutout for it.
That 7075 Al alloy must indeed be hard stuff. Only used 2 blades cutting my build with a jigsaw through 3mm 5083 H321.
Finnster, your comment made me wonder about my build which is XL length. I'd only just got it into a runnable state and hadn't checked the balance point yet.
It's 1/2 cm forward of center

and most of the cutouts in the TVPs will be in the rear so it will move a touch more forward. Battery is 5s 5800mAh (727gm).
I reckon bondo's build should have a pretty decent balance as long large packs aren't used. The flightpower pack i use is quite short(145mm) which allows me to keep it forward ..there should be plenty of space in the DB17 to do the same.