Just do it! All I've done so far is built some kinda gearbox thing no idea what it is yet tbh but that's what I wanted out of it, do a couple of hours now and then rather than thrash it out in a day. Never seen it for £116 before, my missus got mine for £133 from Amazon a couple of months back so £116 is a great price, its price has fluctuated in the last six months from £122-155.
How's the Unimog going? I am soooo tempted to get one.
In fact, having re-read this thread, I'm tempted to get two, and put one away in the hope that it'll turn into a Millenium Falcon style investment.
If I get it from John Lewis, I can pick it up for £116, which sounds like a bargain (though I'm not sure that Mrs Boo will see it that way).