Pam Niedermayer
I'd bet there is no real difference between making a Japanese sole conditioning/scraper and a coffin. In both cases the bed is steep (very steep in the scraper) but the mouth is wide open so there's plenty of room for tools. The only planes that require floats or float like tools are those tall, thin, molding western planes. As before, I'd say the coffin's wedge is tricky.

Pam