Thats a neat driver for high side applications, but i am doubtful if 120ma is enough.
The other thing is i have access to a wide range of components but Mike (OP) might not be able to source dedicated devices as easy in the States.
When i thought about the question regarding Q3 i did realize why you had it in there, and is what my original problem was with driving the high side with 5v logic.
Might not get much of a chance tomorrow night to discuss this further but will get back in the next few days.
Thanks so far Eric.
Pete.