When the existing Hufflepuff Crest is compared to the other crests by this designer it is clearly too thin. I've included two pictures of the original design, below, with the original Ravenclaw and Griffendor designs just to demonstrate the difference. I've provided two modified designs: 175% larger and 200% larger in the Z dimension.

Monoprice Select Mini

No

No

0.1 mm

20%

My remix was really simple. I loaded the original Hufflepuff crest into my slicer (Cura) and changed just the Z dimension to make it larger (175% larger and 200% larger). I've included a picture of the new designs along side the Ravenclaw original. I think the 175% enlargement looks best but the difference between the two is only about 2 mm so you may disagree. Also, the fix I used is simple enough for anyone to do, so you can just follow the same process I did with your own slicer software and ignore my STL files.