thank you very much guys for the nice words, I think I escaped a train wreck lol.
Yeh I looked into doing this a while back, but the MSI 390/390X PCB is just too tall - a good 2-3 CM higher than normal cards, hence the reference 290 board blocks won't fit it properly.
I think the job you did still looks awesome though, that's the only way to get it working, short of custom building your own blocks.
I'd be interested to know your VRM temperatures - the MSI cooler has massive cooling for them via the huge heatsink they are normally covered by - with those tiny little heatsinks you've got fitted I can see them getting extremely hot if you're pushing the cards.
I've done a ghetto mod since the pic, I cut both of my 390 coolers up, I now have the black plate, the water blocks and half the 390 heatsink covering the right of the card - VRM temps are quite good, highest I've seen is 57c on a big session doing this. Best of all, highest GPU core temp so far has been 37c

so happy
This rocks!! BlackJack Davy pointed me in your direction as I am looking at getting 2x 390s.
How are they performing now and would you recommend the setup?
P.S. How much to supply a set of bent tubes like yours?
lol, this was my first go at bending, I just got creative and used things around the house as jigs and marked the bends and sizes on a bit of MDF.
The cards are performing very well indeed, after a few weeks of an issue were I was getting black screens on DP..finally worked out by turning off the pump, it was the pump that was causing the issue. New pump went in today, been brilliant since. Not even reaching 40c on the cores now, idling low 20c's
I'd definitely recommend it, but maybe not the MSI 390. They are amazing cards, so quick, but the lack of a full water cover is a real bummer. Try and get 390's with the full cover for definite.
And here is the milk machine lol.
just a few bits left to do like colour coded cables, but I just want to enjoy it now for a while.