On 25/12/2018 13:07, GB wrote:
On 25/12/2018 12:52, Dave Plowman (News) wrote:

Sounds like a use for one of those self levelling laser thingies. Got one
from Lidl earlier this year and have only used it once - but was very
useful. Not sure how well it would stand up to be thrown around in normal
pro use, though.


It sounds like a job for one of those tape measure thingies. Measure
inside and outside from some fixed point like the window sill. It may
not be spot on, but it won't be out by 12".



That would have meant putting down the cans of beers we had just opened:-)

--
Adam