need a flat surface
I just acquired a new Stanley #4 smoothing plane, but it needs to have the sole flattened and trued up. I don't have anything flat enough over sufficient length that I can use to lap the sole against. Does anyone have a suggestion for where I can get something long enough to lap this kind of plane? A nice long piece of 1/2" float glass would be perfect, but I don't know where to buy such a thing without having to order a huge pane which is way more than I need.
Any suggestions are appreciated.