Thanks for your replies everyone!
First, I admit that I may have been a little stern in calling the judge and my conversation with him, and whilst it was the end of a long day I realise that is no excuse. So I apologise, it must have come across as really out of order.
However, I'm not sure it's true to say that playing additional land in one turn has 'zero chance to effect the game state.' O_o How do you mean?
With regards to the deck:
Well, Sower was awesome for me all day, but in a couple of matches (Ichorid and landstill) I sided the MD one out, so I'm not sure if there should be 2 main or not.
I ran the whole 1 ofs thing just as a joke really, it's kind of worrying that it seems to work so well! haha.
I'm yet to try Dark confident and spell snare, so I imagine that next time I'll be trying something like that out

Engineered explosives is very solid! At the local tournament a couple of months ago I pronouced it my MVP, and whilst for this event it wasn't as good as that it's still something I wouldn't want to cut.
I did get my drains and things signed by Mark Tedin, and chatted to him about the mana drain art for a while, he was a really nice guy! : )
Sensei's top never felt *brilliant* to me, it's always fine, and as it can replace itself (partically with a fetch or tutor) it's never horrible, but maybe I'm missing something with it.
Thanks everyone : )
robert.