You have to call the guy who handles WW here. He never answers email. I talked to him, he asked me to send him some specs by email, and I never heard back. He is nice on the phone, so keep it to that. The downside is everything takes forever to get here and I don't even know if they can get the 50 stuff out of the country. Anyone up here have one? I would like to see someone doing 50A up here. Lower pressure and penetration than the 45-70 isn't all bad. In fact if anyone can show me how to re-bore, I'm willing to set up for it.