Has anybody heard of Whitehead Performance in Canada? I was thinking about purchasing a Longnose R200 CLSD Differential with 4:11 or 3:90 gear ratios. These diffs would be perfect for my stock RB 25DET swap. They import these diffs directly from Japan and sell them for $1200 to $1500 depending on gear ratio. They also seem to check the diffs for any damage before selling to any customers. I just wanted to know if anyone has bought a diff from them in the past.