"Can I ask why not do a reprint?"
When I first printed Lasalle, I based my estimate of sales on previous games, and printed accordingly. With a hardback, full-color book, you need to guess right the first time, because it's just prohibitive to print small quantities thereafter. Unfortunately I guessed wrong: Lasalle sold more copies in five months than Might and Reason and Grande Armée had sold in five years. So I sold out.
However, at this time the relatively slow pace of sales just doesn't justify doing another big reprint and spending $13-$15k. I think there will be a demand for the game in the months and years to come, but not enough to justify that sort of big outlay.
I'm a very small business, and I have to keep an eye on the cost and timeline for printing the next book, so I decided to save my pennies, and let Lasalle run out of print, and concentrate instead on the books to come.
"The problem I can see with the PDF copy to print out is whats to stop stop stupid from printing off a dozen copies for the whole club."
That, unfortunately, is a given.
"Cavalry or cuirassiers as reserve support? Have the organic polish lancers really been taken from the French?"
No, no, no... I just added the "Reserve Allied" support rule from the errata into the book. It's the same rule fix that has been up there for months. It fixes the glitch whereby a French player could get Cuirassiers early by just choosing the Westphalians and bringing them on at-start as an allied brigade.