Problems with Baltic Birch Plywood

Just an update. What I was originally cutting or trying to cut was most likely a Birch Faced wood plywood with no telling what type of glue or core. Now i have acquired some legit imported Russian Baltic Birch that comes in a 5X5 Sheet, I should be able to get some better numbers posted soon. On the 6MM or 1/4 inch class im at about 35 IPM @ 27 Ma with decent success. Ordering a focal lense with longer FL to Help as well.