Cutting Ceiling AC Round Vent Fins

[Montajmahal]

To those of you who have cut out every other fin on your AC discharge vents to increase air flow - can I ask what you used to perform this mod? Dremel? Box knife? Saw?

I am thinking the Dremel would make sense. The reason I’m asking is because any mods I do I prefer that when all is said and done things look as stock.

We are in south Florida full time in our 2018.5 3791RD and the two AC units do a great job of keeping us comfortable even with the t-stats set at 79 or 80 (also we turn the 4 vents in the kitchen directly at the ceiling fan), but more air flow is a good thing never the less.

P.S. out ducts are not collapsed at the air intake (return). The factory was proactive and placed block spacers in those ducts on our unit.

Thanks