GregValiant 1,342
Another option is to make the "hooks" glue on additions. I often put matching 2.2mm holes into mating parts, glue in pieces of filament in one of the parts as locating pins, and then glue the parts together. We get carried away with Print In Place but sometimes making things as assemblies is much simpler and just as strong. Super Glue works well with PLA and PETG.
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gr5 2,224
Personally I would just design the supports in cad. That way you have perfect control. You can put the supports on a different cad layer to keep them separate from the design itself.
Secondly those supports are pretty skinny in this case and so I think I would just stick with what cura already gave you in this particular case. The added material and time is a small percentage of the entire print.
The supports that are in the first photo were almost certainly added by meshmixer. Here's a good (but old) article:
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