I wrote
I need to do a few joints in work surfaces, a couple of them right angles.
Any advice on the way to do these joints would be greatly appreciated. I
understand the principal of the long screw bolts and assume that I router
out the grooves for these. My main concern is the cutting of the work
surface

a) can I use a circular saw?

b) for a 600mm surface at right angles do I cut a straight line for , say,
580mm and then a 45 degree cut for the remainder?

c) in addition to the bolts pulling the surfaces together I have also seen
biscuit joins in some situations - how important is this?

Thanks for all the contributions. I've decided to chicken out and get a
joiner to do the cuts. I will then practise on the removed surfaces to
install in my outhouse utility room.

The only problem now is convincing 'er indoors that I meant Christmas 2004
as the completion date.