Mike, I'm not familiar with the Ziroli P40 but I have the DLE85 in my TFGS P-47. Haven't flown it yet, I'm almost ready for the test flights. The stock muffler is terrible, really big and not user friendly for scale builds. Not sure if a Pitts muffler is available yet. The DA85 has a pits. For the money it's a great buy. I am a big DLE fan. The iso mount is good and I would use it on this big engine. Time will tell if its as good as the other DLE

TB