Thanks for the comments guys, depending how drunk I am after the rugby I'll try to sort out the plasma gun.
Opps forgot to say that the marines are tall scaled
Some better pics first
And the money shots
I've followed the classic "true scale" method as done awesomely by vet sergeant here
http://www.dakkadakka.com/dakkaforum/posts/list/0/437416.page
Where I've gone differently to the srg is I've made the torso thicker by 1mm and added an extra 1-1.5mm to the torso length as below.
I wish I could find the original tutorial still so I could chuck a link up. A lot of hard work but well worth it to settle my OCD.
Thanks for looking, I hope to do more tall marines soon so check out my PnM thread (link in my sig

)
As a bonus here's a tall Berzerker