... web, then attack the other side, leaving the bottom bit as is. The less you file into the web initially then the more bottom bit you have on the other side to discourage the planed bit from flexing too much. Cheers Nigel posted: 1 Oct 2010 16:25 from: Martin Wynne Oh dear, do we need a handy hint to explain the handy hint? I thought the site header looked a bit "texty" and an occasional image or diagram relevant to our subject might make it more interesting: 2_190931_260000000.gif Bill_Lobb wrote: Am I right in thinking that if you ink the rail, then file it so that the shiny bit looks like the orange part of the diagram, you will have filed half way through the rail at the tip? Hi Bill, That's correct. It's a side view of model bullhead rail. Most such rail has an over-scale* web thickness approximately half the overall rail width. So if you ink the rail and then file the planing length (shown orange) on the back of the ...