Gerald, am I right in assuming Crawley's referance to the Monbath Manual, by Grout Haist in the 1972 BJP Annual is a Typo for Grant Haist, when was the book published, and rather was it revised after 1972.

Not quite sure about your referance to Two bath monobaths, Crawley does indicate that FX-6a can be made up and stored in two parts before use. But it's a obviously a true monobath when mixed for use.