I've being following your build for a while now and i'm liking it a lot.
Just taught i'd chime in with a tip on how to level your lights a little easier.
Cover the area where the lights will be mounted with clingfilm or tinfoil, then spray on a generous helping of your expanding foam. when it's set you can carve it in place or pop it off to carve because the film/foil will stop it from sticking to the surface but it will now have the awkward curve allready formed on the back.
That brown shiney packing tape is also good to use as a masking to stop the foam from sticking to the surface.
Looking forward to the next instalment
