With a sharp centre punch and a pillar drill you can sort them out.
The drilling guide, as illustrated in Woodrow, isn't your saviour. In my experience it is less accurate than the centre punch/pillar drill. At least with a pillar drill you're not working blind and just trusting that any accumulated movement on the studs isn't significant.
The drilling guide, as illustrated in Woodrow, isn't your saviour. In my experience it is less accurate than the centre punch/pillar drill. At least with a pillar drill you're not working blind and just trusting that any accumulated movement on the studs isn't significant.