As far as I could tell, the only way to get 1F is by using a hex arm on a track loop and advancing the arm along the loop for each grab. This solution has 18 pieces of track, and I could see it possibly going as low as 16 (270 G), but maneuvering the atoms around at that point becomes difficult and you may need to add more track anyway because you need to reach a bonder from a certain position. I had a 19 track solution previously and tried to make a new one with 17 track in the last 2 hours and came so close, but had to settle with adding 1 more track, netting me a 5g save in the last 10 minutes. Even forgot to change the title of the solution but won't bother going back into the game to edit and resubmit.