Hi Soggy, I have just read the article and this one for sale seems to be the standard stuff you get with the Kit from New. Seems the bloke is passing the kit on.
Just looked at Engels website, and from new the TMAX which is the best one will got for 965 Euros, and into Australian Dollars ( if thats where you are ) 1591 Dollars.
Think I would be getting it from Engel brand new , then at least you have a warrenty just in case there are any glitches. Dont know about delivery charges however.
And given your background, I would definately go for the Engel. I think you may find the Robbe pretty easy.
As for the cutting slots etc, its all outlined on the hull already. All you need is a few needle files and a lot of patience!
Have a look at Engels site, and if you need to ask any questions, they normally reply asap.
Paul