Brushed off scabs/scales (due to non-peeling) using a dry razor 5 days post CO2 laser. Is this alright?

I can totally understand your desire to get the scaly skin off the surface as soon as possible after CO2, and you probably didn't do any harm, but I wouldn't do it any more and just let the skin come off at its own pace for the rest of your healing.  We always warn patients that they are going to have at least a week of looking pretty rough after an effective CO2 treatment, so it is best not to plan to be "event ready" in a week.  Hope everything is going well with the rest of your recovery, and I hope you have fabulous results!

I can certainly sympathize with your dilemma. There's no way to know if what you did will have negative affects on your outcome. Time will answer that.
Generally, the natural healing processes should be allowed to run their course for the most predictable outcomes. 
Given you had a scaly texture, you probably were not keeping your skin moist enough.  Keeping your skin very moist until full sloughing has occurred and then switching to a frequently applied lighter high quality moisturizer will provide the best results. As you note, a good quality high SPF sunblock is essential when outdoors. 
Wishing you a wonderful outcome!
Warmly,
Arbella Sarkis, MD