I am running a Tam's P-60 screen on my 70 and it is perfect. I had the problem in my A-4 where the ring of the P-70 would extend past the outside of the turbine case. With the P-60 screen the edge of the ring sits perfectly flush with the outer case of the P-70. Tam, you should just start notching the P-60 screens and call them the P-70 screens, much better fit.