Enhanced Calipers

I rounded off many of the sharp edges where the two parts of the calipers meet. This is because printers are not good at printing perfect corners, which makes the tolerance more inconsistent, and these points are the only points that rub against each other, which is not good if you are trying to tune it to get a sliding fit (and also add some fuzzy skin for increased friction). Also, I simplified the geometry for the contacts of the calipers, as the large block contact area (next to the sharp measuring edge) was always not lined up with the sharp measuring edge of the caliper (due to slicing), leading to the calipers not completely touching even when the calipers are as closed as possible. So for this reason, I just completely removed the block. And that's it! By the way, I merged the caliper files into one file because I was too lazy to export them separately and it is also kind of confusing for me to download two separate parts. But I did place the closest points of the calipers rela