from patent US3917695:
from other patents related to PAP purification you can find information about participation PAP from acidic solution. many patent state that participate PAP doing at pH > 6Quote:
The solubility of p-aminophenol in water can be increased by addition of inorganic acids such as sulfuric or hydrochloric
Are you using 11X14 film or something smaller and then enlarging to 11X14? If you are using 11X14 film and grain is a worry you must be making very large prints. If you are using a small format like 35mm then just go up to 6X7 and you can make grainless 11X14s with any number of develoopers.
Evan - when you have some results please post back. Always curious to hear impressions.