About this 3D model

Since I got my Wanhao D6, I wanted to make the spool holder better, so it can fit all (or at least most) types of filaments. I have seen many here, and also printed many and they either do not work or I need to go shopping for parts like I need to build a SUV axle. So, here is a solution that works like a charm with no moving parts, and no need to go buy nuts, bolts, ball bearings and shafts. The spool holder is long enough for all filaments that I've tried, but not too long to make bulk on the back side. The limiter plug has 3 holes to be put in, depending on the filament spool thickness. If you have a really really thick spool (I have a few) than you can remove the limiter plug completely, and the cap on the top will act as a limiter itself.