I've renovating my Father-in-laws hand planes which were handed down to me. I treasure them and have renovated most of them. I'm not a professional, but am a serious amateur. I've renovated several of his low angle block planes first as I found them the most useful. I need to update/improve my shooting board and I saw a "You Tube" of someone using a #5 as the hand plane he used with the shooting board. I thought that would be great to really improve Dad's 14", #5 Bailey which I had only lightly renovated and use it with my new shooting board. The blade, chip breaker and lever cap aren't in real bad condition, but if I'm going to do it right, I think I'd like to put a good replacement unit in there. I know Lee Valley has replacement units of A2 and O1 steel for Stanley/Record handplanes. What reading I have done leads me to think the A2 would probably be my best choice for a shooting board. You guys and gals are the experts...your thoughts?