Does anyone have any experience with the Corona 18" machete made in Columbia? I bought one ($8 at Lowe's) and used it some last weekend on Cedar, Mesquite, and Oak and, after an initial sharpening with a file, it seemed to cut pretty efficiently and hold a decent edge. The blade has a nice ring to it when in use. The only minor complaint I have is that there is a portion of the blade, right at the sweet spot, that seems to be unusually hard such that the file will barely bite into it. The edge was a blue color due to heat treating I guess.