use Sean's patentent long 10mm bolt trick when putting the boxes together works wonders, you'll need 10 least 3 100mm long 10mm bolts use them as guies to locate the boxes ;)
Maybe worth your while sending off for the V5 will get more than the £19.00 you have to pay for it extra on the chassis.
just fill in the form with the chassis number and ya name 4 weeks later you get a V5. had to do that with my 110 ;)