It's not hard and dosen't require a lot of math. If I can do it anyone can (Everytime I start a project I have to hit the books and refresh my memory)

There is an excellent article at http://boozhoundlabs.com/howto/
He walks through the whole design of a 6v6 amp. The first few pages are a great into to load lines and op points. Read it a cople of times till you can draw your own, say at 200V or for a 3k load.

There will be a quiz tomorrow, so everyone bring a #2 pencil to class...John

But with load lines, many copies of the plate curves and pencil is a far easier method.
regards,
Douglas