John - I do have a set of Hirsch and it did take a lot of work to flattent the backs. But in my continual search for the perfect chisel, I bought a set of LNs and appreciate the way they're made (accurate).
And now, just for fun, I'm in the process of putting together a set of Witherbys (buying one at a time). They seem to be good chisels, also.
To give an indication of the differences, if you put a set of calipers on an LN, it measures exactly what it's suppose to be - a half inch chisel is one half inch. If you measure most older chisels, they're never what they're suppose to be - most are larger by a 32nd or a 64th. Not that it makes any difference in the use.
Congratulations on your LNs. I know you'll enjoy using them.
Mike
Go into the world and do well. But more importantly, go into the world and do good.