I have the black nickel ek compression fittings and I used mayhems pastel and the black colour was stripped of leaving a glorious silver on some parts of the component. Whether that is a sign of how potent mayhems dye biocides are or how low quality the ek plating job is I don't know
thanks for the heads up/info on that mate. if i was to buy black fittings its because id like them to stay black tho so id say that might have just made up my mind to go with them nickel ones
been messing around with the res looking for some where to put it and came up with these ideas so far of course thats unless some one else has anything else

. the photos are not to good as they were taken on my phone as normal (because im to lazy to get the DSLR out) and the plexi reflected the light back from the flash.
option one: - mounted on the back wall of the lower part
option two: - in the centre of the lower part. hoping if i did this i could get it up high enough to mount the pump under it or maybe just in front to help with the tubing runs. liking this one as it means you can see the res clearer throw the window as its not stuck right at the back
of course this option left me with a problem of how do you mount the res. i had thought of maybe a bracket from the floor or roof that i could screw the mounts to but then thought that option would not look to good. so the idea is to use some 40mm round Perspex rod with two slots machined in to it so that the mounts can be screwed in there and the res mounted to that. the Perspex rod could also be lite up with LED's to provide some lighting in the lower part.
this is the sort of Perspex rod i was thinking of
option three: - i like the look of it here but getting good flow out of it would be hard unless the pump was mounted under this section
althought i could mount it the same way up on the roof but this could mean large amounts of tubing on show which im trying to avoid due to it looking a mess.
Of course the fan was there just to raise the res off the floor for a better idea of how it would