Most of you know that I stick to the smaller jobs nowadays. I'm starting a rather big one (for me) on Monday, 250+- yds. of Armstrong Commercial Something. It requires S-599. the notching recommended is 1/32X1/16X5/64. This seems crazy thin. So my question to you commercial guys is...how often do you change the blades, do cheat and start bigger? (I used to with VCT), do you use the right trowel blades and change them every 2 gallons like Armstrong used to recommend? or do you just use a roller or piece of cpt glued to a trowel?