Still not entirely sre why you felt the need to remove it or indeed to trim your steerer. The damage was done installing it. Removing it does not improve the situation and very likely makes it work doing further damage. If indeed damage was significant in the first place. Years ago I had the privilege of going around the Mclaren F1 factory and saw the state of the tubs of the cars being used that season. Cut and shut does not come even close. It change my attitude to he stuff.
Also, many folk don’t realise that the sfn or their bung equivalents should not be loaded once the bike is built up. They are merely there to draw the parts together in tension before the stem bolts clamp everything together permanently. Once done you can remove the top cap and bolt (and the sfn for that matter) with no ill effect.
Then cutting down a steerer because the original setup had too little steerer interacting with the stem…..A correct setup with a carbon steerer would be a max of 30mm of spacers the the stem with 5mm of steerer poking out the top and another spacer before the cap. I’d have had the slightly marked bit above the stem and minimized the change to the bike setup.