I am fitting one of these in a new bathroom. The Eurodisc comes with two
chrome tails already fitted. In their instructions they show the tails bent
outwards at about 45 degrees and then bent again vertically. The tails
terminate in two connectors that stick out of the wall horizontally. I've
got a couple of snazzy chrome Super Filters and these have a 1/2" male
fitting at the other end.

My question is this. To conceal all the pipework, I've made a false wall
using moisture resistant MDF. I can mount a pair of right angle female 1/2"
thread connectors behind the MDF (ready for the Super Filters to screw into
from the front side of the MDF). But to do this means drilling some neat and
accurately placed holes in the MDF...so that when I bend the chrome tails on
the Eurodisc taps, the tails will then coincide with the Super Filters. But
it's a bit chicken and egg to me as I can't see how I can work out easily
where to dril;l the holes BEFORE I mount the MDF (since the basin will then
mount after the MDF). If you see what I mean ?

Any advice gratefully received

Londonman