Bitmain has a new repair depot in the US. It should make warrantying systems much faster and much cheaper as you dont have to air freight the unit to Hong Kong anymore.
I think you're talking about this site right?
https://bitmainwarranty.com/product-category/repair-service/I was never sure they were legit part of Bitmain, I know they are legit but wasn't sure if they were part of same company or just did repairs and sold parts.
I have my miners at Giga Watt, they do repairs on site so minimal downtime and no shipping costs. They are sold out of miners but you can ship them your miners for hosting, you might be able to ship them for repair and then have them host it. They are in Washington State so cheaper shipping than to Hong Kong. You can try contacting them,
support@giga-watt.com If you get tokens before the ICO is over you host at 3.3c kwh with no hosting fees. After that you can rent tokens from token holders but think you might still have the hosting fee not sure. Token sale ends soon but you can still buy if want
http://alturl.com/ugese