Well, the 1st test day (Thurs) showed negligible drain. (Thanks to Data for clarifying)
In order to not confuddle the brute said first day test was done with the alarm and bonnet switch disconnected, and vehicle locked.
2nd test day (Fri) was left pretty much to it's own devices, ie. locked with alarm and bonnet switch disconnected. No discernible loss of volts.
3rd test day (Sat) commencing 4pm, the static volts were 12.68...
the only thing I've changed is I re-connected the bonnet switch, but taped it in the OFF position.
Alarm is still disconnected.
Will check tomorrow at some point.
Things seem fine.
(Alarm disconnected because I suspect internal batteries leaking and fouling the the circuitry)
(The dumbass in me totally forgot to actually test the bl00dy thing first!!!)