Looking good Jim - and I see you've cut out where the sub goes in your box, you had me worried that all this proffesional work was going to come to a sad end!!
Head unit is looking sweet, the sub looks wicked, crossovers like you say a tad large, but 10kg's in weight!!
How heavy was the BOSE amp and Sub, don't forget to weigh them and deduct from your 10kg+ additions.
I have to say I really like the look of it all, so I'd be interested to hear it. Hopefully at the Midlands meet eh?
Great work