[azapa]

question here:

The "U" is the most often seen guide shape, it is always wider than the spear, I would guess about 4mm radius, to accomodate up to 7.5mm dia spears. There is a lot of contact spear to guide.

What would happen if you used a "V" section? The contact and therefore friction would be very much lowered. Also, spear diameter changes would be easier to accommodate.

I invisage a stainless V (angle) epoxied into a nice piece of wood. I'm sure its been talked of before. Pros and Cons please..