I will agree with Harry on this one..
"very dangerous thing to do"
It's true the blade is pushing the stock back to the stop board but it's also trying to lift the stock up at the same time unlike the safe way by pushing the stock back to the stop board but it's also push the stock down to the table top....
Also it looks like it's time to replace the top of your table top,once the top has all the material removed from under the blade it's unsafe ,small parts can drop into the cup so to speak and can jam into the blade ..if you see cut off parts take off like little rockeys it's time to make a new top...this is a real tip off. just a old time users 2 cents..
I replace my top about 4 times over the years

the top I have is not the norm, it has snap in Alum.bars to cut stock from 0 deg.to 90deg.without moving the head stock...great for making frames,etc. left and right side thing quick and easy without moving the main head
Here's just one little tip,,make a stop block for the column this will stop the blade from going to deep,,,,,I use a block that's in place with a big hose clamp on the column,,if you want to see a snapshot of the block ,just ask and I will post one.
Just one more note about the RAS,,, it's great tool to cut 4' X 8' plywood stock

I have a flip up table top (1 1/2" x 40" x 7' ) right next to the RAS that can hold the plywood for ripping...and I use ( 2 each) roller stands that's on the out feed end of the RAS to pickup/hold the ripped stock...
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harrysin said:
If wrong I'm man enough to apologise but I really do feel that up-cutting across the grain on a RAS is a very dangerous thing to do, sure, you may have gotten away with it for years, but that's how serious accidents happen, it appears to have been a safe method, then bang, an "accident" only it wouldn't be an accident, it would surely have been caused. Can we please have some expert opinions on this matter. Possibly even from RAS makers as well.