Hi, Sparky
If you generate 2 layers have layer 0ne do 90% of your cut depth the second layer trim out 3 small sections for the final cut would be the same as you stated, "were the bit raises up to pass over the uncut area (tab) and then drop back down to continue cutting".
Once you load it into LasyCam Right click in the second layer theres a option to select Multiple Items / chain's.
My son wrote a dos cnc program that would cutout Sprew's in a round mold that you could select how many. there width inner and outer limits, sorta the same but different.
The multi layer may work just fine, these things always take a little work, at least it forces es our Cad skills to Improve.
I need a-lo-ta-work in that department.
Thanks, Chip