It turns out that you can in fact withdraw a little bit at
a time from BT margin lending.  Although the initial amount
needs to be 50,000 (and you can actually put 10,000 back
straight away), from then on, so long as you maintain your
account balance at 40,000 minimum borrowing, you can withdraw
in chunks of whatever you like, e.g. $6,000 every 3 months.
This is what I want!  Unfortunately I am having trouble
borrowing against my Pacific Basin shares because they are
full up on that one, so I have to wait for a redemption.
BFN.  Paul.
@EOT:

--- Mksmsg