Thank you for the cool project and experiment!

If you could, please mention   that any hardware modification will void Bitmain Warranty Qualification, if you could....



But,  what about the 4 data cables and 1x 4 pin power cables for controller board? They need to do a longer or replace it.

I think so, the divider looks like you can attach a controller card to each side.  I just don't get why it looks like there are 4 Ethernet openings between the fans (looks like they've upgraded to 140mm fans).  I'm also curious what type of cooling kit will be offered?  I don't think the C1 cooling kit will be enough to cool it.  Or will it be the big kit and that will be enough to cool 2 of these?

EDIT:  I see now, 4 controller cards (do the other ports not work on the S5 controller card then, shouldn't you only need 2 of these with 4 S5's?), 2 on each side of the divider, equal to 4 S5's (8 blades/boards) or that was the original design, so yes it's probably one of the big radiator kits for each of these since it's 2400 watts.

Looks like this will need at least two 1300 G2 power supply, using all the PCIe connectors (4 single + 2 double connectors = 8 ) that come with it, on each side.  With 2x 1600w power supply you may be able to add an additional S5 to the setup (=1200w x2 + 600w = 3000w), but will need to purchase a couple of extra PCIe single connector cables per power supply if you want to add the additional S5, by the way the T2 Titanium has been released).  Hopefully it'll be enough to power the 8 additional fans and the pump also.  Would have preferred the controller cards at the top with just 1 per side (=2) like the current S5, if it needed 4 then one facing each direction (front and back) may have been better if the lower board was slightly shorter and only half the length of the S5.  I'm estimating that the kit and additional S2 big radiator kit will be about $300 plus shipping (4 watercooling blocks = @$100, cooling kit $120, enclosure, cables and 2 fans =@$60).

Are these the same watercooling blocks that fit the S3/C1's with just a different screw hole location on one side of the watercooling block?

ANTS3 Water block   http://shop.syscooling.com/goods.php?id=47

Today I received  4 pc. Screw holes location  on both sides  and it  is compatible with the  S5 hash boards.

One side has a total of 20 screw holes. Exactly the same spot where the S5 20x screw  holes is.

C1 uses S3+ boards, only the data connector is soldered to the other side of the boards. The same 20x screw holes.

OK, if the kit is reasonable, then I'll order a kit, but know that the shipping is really high to the U.S. (the big radiator kit along was more for shipping than the $120 price).  I'd be interested to see if it can cool the 4 S5's enough to run them at 412.5M constantly (that should be about 1400w per side, so two 1600w power supplies should work well, that would be about, = about 1,350Gh/s x2 per side = 5,400GH/s)?

From 1 x C1 boards+ controller and 2 x S5 leftover  parts I built air-cooled C1. In the same style as the S5 . The two pieces side by side, and only one has controller.

This would be a lot more attractive if Bitmain would ship bare boards.

Screws and springs are easy enough to source, though they could include them. I would envision the cables being included in a kit consisting of a BBB, the controller board, four hashing boards and the needed cables. It's nonsensical to purchase the aircooling heatsinks, fans, extra controller and plastic bits just to ship all that weight across the world and then strip it down and throw it away.