I had them trimmed and added clean mounting holes to the resin casts. Does the job very well. I can drill as usual and then swing the drill up and down to drill in an X shape to allow the loop to go through without creating too big a hole. It should also be noted that I used spiral grooved drill bits, the circle is cut in the past. They are blunt and break easily. I plan to test them on it in the future. Judging by the increased filament and the significantly higher sharpness, I think they will perform reasonably well.