Re: Tight mouth?
joel -( tools for working wood)
>A mouth consists of 2 parts, the open bit in front of the cutting iron, and the gap between the iron and the bed of the iron.
With a shooting board the gap in front of the iron doesn't make much of a difference but when using the plane free hand a very tight mouth gives you better, more consistent performance and stability.
The back gap is more problematic because with a bevel up plane (especially one ground at 25 degrees) you have very little blade support and very little blade clearance and the lack of support really compromises performance.
But I don't think you have to listen to me at all - just compare a top notch example of a mitre plane to an average mitre plane and the difference will be instantly apparent.
Incidentally the mouths on the planes by Bob Baker who makes the finest mitre planes on the market today, are monumentally fine both fore and aft and if I was in the market for a new mitre plane he is the vendor I would consider first and foremost.
joel
(Mitre plane collector)