I do not own a HI (yet), and my order from Cold Steel has not yet come, but I've been playing with a CS khukri machete for a while, and it is an exelent weapon, given that you have it with you, and a fair bit of distance on your side.
The CS return/breakage policy on all fixxed blades that I know of, is a five year replacement. But a knife( HI,CS, anyones) is a simple tool and if you break it you probably did something wrong, like prying, hammering... The fact that HI includes theyre blessing, means alot to me, thy dont just want to sell you the product, they want it to serve you well for the rest of your life.
By the way the CS ''LTC'' kukri is 3/16'' thick and the ''ghurka'' kukri is 5/16'', maybe this helps?