I received a new LMS HiTorque bench mill (Seig X2.7 equivalent), and got it all set up on its stand and trammed in the table. Then I got the vise indicated in (0 variation on the DTI over the 4" of the reference jaw of the vise) and tried to square up some stock held in the vise. When I removed the stock to check square with a reference square, I saw a *tiny* wedge sliver of light, indicating that the cut was not exactly square. I re-checked the reference face of the vise again, and it was still at 0 across it. So then I put a square in the vise (the same one used to check the cut on the stock), and indicated along the edge of the square (in Y). Over approx 3.75", the indicator showed it was out of square by about 0.0045-0.005".
I contacted LMS, and they had me go through a couple of other steps (I still have to double check the squares are indeed, square), and Chris Woods' excellent customer service reputation was put to the test. I am pleased to say its still very robust!!
In this case, there is no way to shim out the error in Y, and it looks like LMS will be sending me a new saddle. Once I confirm the squares used are indeed square, and double check the Front to Back tram of the table, hopefully the saddle will be shipped out tomorrow.