Not to hijack the thread, but is there different cooling options for the S1 blades? With all the abundance of blades being sold on eBay right now, along with the progress this thread has made, I can't help but to get excited over the prospect of a dyi multi terahash rig.
I think looking about optional cooling is a bit irrelevant for S1 and even S3 if heatsink is there.
Earlier I tried something like that in S3 then forced to drop that project midway.
They are at current price its difficult to ROI. For hobby purpose it may be ok.
Try sinking the heatsink in running water or mineral oil.
Be very careful if you are using water, water is electrically conductive chemically reactive.
Better discuss the project in a new thread, I'm interested in seeing that.