Detailing. I've employed a few borrowed techniques from DonC and a few others on plaplate detailing. Man this is PAINFUL work (mainly because of my eyesight, and my lack of dexterity/patience when handling/cutting very small parts. I don't know how DonC and the other guys who do this DO this).
I penciled the design on the armor itself (this one attaches to the back of the thigh), then overlayed a wide piece of regular office type masking tape and and traced the initial sketch. I then attached the masking tape to a 0.3mm plaplate and made two copies by taping another piece underneath and cutting them at the same time using scissors and side cutters. I used this technique to most of the detailing mods that needed at least two instances of the part.
Minor Rifle Mod. Using an ample-length 1.0mm plaplate as a guide, I enlarged the rectangular hole at the side of the Rifle extension by cutting away about 1.5mm from the opening so more of the inner detail can be seen.
I filed the resulting edge at about 45 degrees to restore the bevel (using another guideline lightly scribed on the part itself. This is the same method I employ in sharpening blade edges but at deeper angles.
With the Double Bolo and shoulder mounts.