Issue with EK FC block and HD4870 X2

Hey guys I have researched the issue a bit and found that apparently the EK FC GPU waterblock can cause the HD4870 X2 to not start up...something about the M3 x 6mm screws needing nonmetallic washers to avoid some sort of short circuit.

The problem is I used washers as instructed and still got nothing.

Has anybody else had this problem mounting an EK FC to an HD4870 X2?

I've tried everything I can think of and before I return the lovely blocks I thought I would see what others have done to work around this.

Thanks.

http://www.hardforum.com/showthread.php?t=1343401
Here's a thread with that issue

http://www.overclock.net/ati/388361-solved-4870-x2-no-longer-functions.html
And yet another thread this one by an experienced LC modder with the same issue

http://www.ekwaterblocks.com/download/EK-FC4870X2_installation.pdf
The EK PDF that mentions using the washers

http://ekwaterblocks.com/shop/product_info.php?cPath=21_31_42&products_id=303
And a mention of the issue on the EK site.

It's driving me mad since this is for a client and I am supposed to know what I am doing

I have mounted nearly identical blocks on my HD3870 X2s without issue...so I know the routine..or thought I did. What amazes me is that EK would even have a problem like this with their gear.

Thanks in advance.