I've got 3 planes (a Stanely low angle block plane, new; a Stanely No. 5, English farily new, but used, and a Merit No. 4, used in fair condition). I've followed several guides on reconditioning and tuning the No. 4 & 5, sharpened the irons using the scary sharp method assisted with a Veritas Mk II honing guide.
I am getting, what seem to me at least, good planning on softwoods and a bit of red oak with these planes.
My question is - What is the correct set up, or tightness for the lever cap. Right now the No. 5's lever cap seems a bit loose. It will shift at times when changing/adjusting the iron. The No. 4's lever cap seems too tight, making it hard to adjust the iron. Is this just a trial and error process or is there a right tension that can be set by more than a 'lets try this' approach.