JPF - I can't think of anything to add that the others have not already suggested. If I have some time this weekend, I will search back into your past threads. Jen-Jam's H sounds very much like my W - and I suspect your W as well.
BTW - I might be in your neck of the woods. If you feel like it, you can send me an e-mail with contact info...
Me 52, STBEX 52 D 17, S 12 M 20 years Em Sep since 2002, Phys Sep Sept 2009