what alot of people need to remember is stuff like this has been coverd in DEPTH by alot of people ourselves included as we were one of the first to experiment this topic i.e. intercoolers/grs/laguna/whatever was coverd more than 2 years ago, nearly 3 years.... so there is alot of experience on these forums with tried and tested attitudes ourselves included. but equally at the same time there are opinionated people without experience
To give an example I personally have gone through 5 fmic revisions (just about to do 6th) since having the GRS at first. and 4 pipework revions Its not as simple and straight forward as people think, lots to consider i.e. core depth/width/height, core manufacture design, pipework design, end tank size/entry, CFM, pressure loss, number of bends, type of bends (mandrel/cut type etc) bore of pipework, number of connections, harshness of bends etc etc
You pay your money for the above as development aint cheap, trust me and still paying for it 3 years down the line but no one should be slated for trying as its part of development aslong as any comments are constructive and informative