Ha, when you're gonna grind hardcore with your pro-model without any grindrails (with grindrails you will have to drill holes, possibly making the deck weaker), then you're gonna wear your deck out, escpecially at dropouts aera, but on micro you can just switch reinforcements.
btw, my pro-model is still lasting, after welding that one little crack at the dropout and foldy rails to the deck on the sides for extra, the deck still lives and it's solid. I sold it to Andreas and it has lasted for a total of 14 months now.