In an earlier contribution to this discussion,
Mike wrote:


2 other questions - ;-)
1) the wall is an internal wall 2.4m long between two bedrooms, with
only the loft above. Will there definitely be studding, or am looking
for something that is not there ?

Yes. You may even see the tops of the uprights in the loft - but there's
probably a horizontal member right over the top, so you won't.

2) PP9 batteries - how come they are only ever found in devices you
only use once in a blue moon, and how come their lifespan is always
bluemoon ?. I really cant see any justification for not using AA
cells

You probably mean PP3 - which are 9v. You would need 6 AAs to get 9v.
Duracel PP3s have a shelf life of quite a few years!
--
Cheers,
Set Square
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