I have a bunch of largish parts (6” x 3” is the smallest) to cut out of 1/4 inch aluminum. I did some testing with 2mm tabs and it was fine but it’s a bit of a pain to cut the tabs afterwards. For parts being cut out, am I better off:
I plan to use a 1/8” O-flute, if that matters, at 30 in/min.
@barthrh I’ve not done a lot of work in aluminum, but for the few that I have done, I used blue tape+CA glue for hold down. I also used side clamps to prevent any movement in X and Y. So far, so good. 
@barthrh If you go for the tape method, don’t use any lubricant that could dissolve the tape adhesive.
Another method, which is sometimes overlooked, is if your part has any holes in the middle. You could drill those out first and then use a screw to fasten your work piece to the spoilboard.
Replying to my own thread. Went with blue tape and it went great. I really didn’t like tabs. 3D tabs were a mess in aluminum, and the straight plunge on the 2D ones is hard on the bit.
+1 for ca glue method.
When the parts come off with the tape still on them, I often will soak a batch of them in isopropyl alcohol overnight and it comes right off with no residue. It can be a pain if you have 60 tabs to peel.
Why would you have 60 tabs on anything ??? While I don’t do aluminum so far, I would have 6-10 tabs on a letter sized project. I can’t imagine 60 tabs.
I could be more than one part. My project was 12 parts cut from a 600x1200mm plate. Would have had about 40 tabs.
I used to order 20k in laser cut parts a year. Now my little friend spits them out with weld ready milled edges…