Sweet.. PADI is a great organization... As you are well aware of.
When I lived there I never dove Lk Washington. I dove out of Lynnwood area.
There is a site just N of the ferries. You may know the site. Also across from
Downtown Seattle. The name escapes me. I left Seattle in 86.
Mel is with Silentscuba out of Seattle -or- is it Everett... Hmm..
Good luck on your DM.. I found it to be very rewarding... You'll learn a lot..
If I can help in anyway, just write.... I'm a PADI instructor.
Cheers,