I jst wanted to post something on the Bone Frontier 8-25 100kw water cooled machines as well as their S4100.   I run 20 or so of the 8-25's and over 60 of the S4100's.  Other than the normal breakdowns caused by opperator error or the obvious reason for failure like 1 GPM water flow when 6or so is required  these machines are extreemly rugged. We have Drop tested them. .. Ok.. I know you are hinking  DROP TEST? Who in their Right mind!?   .. Ok.. it was not a planned drop test.    I have had a S4100 loaded in to one of those silver airline containers to be shipped across country when the airport baggage handelers presses the wrong button and sent the LD3 container the wrong way while loading in to a 747.  Thats about a 20 foot drop landin on its side.  After getting the machine back we opened it up to inspect damage. Well... to out surprise. Very little was broken. Standoff for the board (nylon) buss bars were twisted. 2"X2"X1/4" aluminimum angle was bent and some welds were broken. .... so before anything else we thought .. well lets see.   we put a peice of cardboard under the board where the stand off were and just checked that none of the buss bars were touching and to our suprise.. it worked fine! 

at a different time we had one of our drivers load a machine on a box truck then take lunch. following lunch he left without strapping in the machine or even closing the door on the box truck. He got 3 blocks away before the machine fell off the truck.  Here again. Standoff to the boards were broken.. a peice of cardboard and the machine worked fine!

And the 8-25 100 kw water cooled machine.. this was dropped by a forklift opperator in a power plant.  drove the forklift blade through the side of the machine too.  Same thing. a peice of cardboard and away we go!

I am not saying the standoff to the boards need to be stronger. Only that these "Drop Tests" were far more than any other induction machine I have ever used could possably withstand.  That alone should clue you in to the level of engineering put in to them.