There is some confusion to how the Loop 900 works. It does not move the spacer, it moved the axle nut which makes the gap thinner or wider.
What really matters is that YoYoFactory has delivered on one of the most genius axle systems I have ever seen. This is the culmination of adjustable gap. The Loop 900 is amazing. It is exactly what I have been looking for in a 2a yo-yo and is the tool I need to work on my 2a skills.
Thank you YoYoFactory