Just for the record, we offer the HDSX6
for US sales only that includes a Hard Drive Extended Instruction Manual shipped priority mail for $595.00. Most times we have an inventory of a few units on hand. I am pretty sure we are the least expensive in the US.
The extended hard drive manuals for the HDSX 3 and HDSX-6 are sold separately for $19.95 and
$24.95 respectively:

( http://www.wtenaykeyboardstudios.com )