ZAM...just had a thought...MONOBATH for direct positive paper MAY increase speed to be within actual usable range....as I remember the monobaths from a LONG time ago..they had the effect of increasing effective film speed...like as a normal side effect of standard operation...this is DEFINITELY worth looking into--not making "polaroids" but maybe some kind of daylight filmholder/developing tank/monobath arrangement where you use the dir pos paper and then are able to process in a few minutes in a monobath....