Having used various cheapo tenon saws (with thick blades and big teeth
set) I decided to take the plunge and try a LN "carcass" saw.
On the one I've bought I've found that the blade isn't quite true (it's
obvious when looking down the blade) - on the concave side its out by ~6
thou in the middle.
Is this realistically an amount that matters ?
Although I bought it for sawing the shoulders of small tenons, I tried
it on some 5" shoulders (only 1/4" deep) that I happened to be cutting
in some ash and found it hard to cut accurately to the scribed line (*1)
- though I'm the first to admit that this could well be due to an
absence of skill :)
*1 - my technique, for want of a better word, is to start off cutting on
the right-hand-side of the scribed line (I'm right handed) on the far
edge and as the cut progresses gradually lower the saw so that
eventually it's cutting the full width (I do this to stop it skating
about all over the piece when I start the cut). I found that by the time
the saw was cutting full-width the blade had crossed the scribed line.
Looking down on the saw it's concave on the left-hand-side.