Howdy I can get a ali radiator for my GQ with a 70mm core....is this a good thing or does the extra thickness actually make it harder for the air to get though or limit the flow in any way ? also the coolant that is recommended for the TB42/E would or does it harm ali radiators ? sorry if this has been brought up before somewhere but I cant find it if it has.....this rad can be brought for $399 NZ down from $599 I don't have any problems at the moment but just wondering if it is one of those things a person should buy for those "just in case moments" or for the price anyway....will try and put up a link.......cheers