I've been everywhere ooooohhh yeaahhhh still I'm standing tall.
Barry Thornton's formula uses 6.5g of metol and 80g of sulphite in bath A plus 12g of Sodium metaborate in bath B. This is as good as any other 2B around IMHO and cheap/easy to mix.
"He took to writing poetry and visiting the elves: and though many shook their heads and touched their foreheads and said 'Poor old Baggins!' and though few believed any of his tales, he remained very happy till the end of his days, and those were extraordinarily long "- JRR Tolkien, ' The Hobbit '.