The poly topped dtek white water can now be had for $49.99. It is a pretty darn good block if you ask me.
Also, do you already have the innovatek blocks.
Nothing against them, but I would suggest keeping the whole system in 1/2" ID. When you say that the innovatek blocks are 8mm, is that ID or OD.
A thought for you. Two 8mm ID hoses is more restrictive than a single 1/2"ID hose. If it's OD, then they are a LOT more restrictive.
http://www.dtekcustoms.com/index.asp...ROD&ProdID=106
8-ball