Jean,
Glad to hear you're home and that this is behind you now. When you're better, some of us Minnesota valvies will have to get together! You take good care!
--John
P.S. so whose valve is bigger? My homograft is only 21mm (sized differently than mechanicals) but it is turbocharged! Plus, I am pretty sure that it's not size that's important, but how you use it. Hmmm, I don't KNOW where I heard that before...dang pumpheadedness!