Hi, after pass from bands to tubes (more more last!), i really prefer the red tubes, it seems perfect for everything equal or lighter than 14mm lead ball! Green, Blue, Black and Silver are too slow. Blue is good for very heavy ammo like 30g. Yellow is good for light ammo like 9g. However, sometimes i miss the bands, but them did not last at all! So, after some think i'm gonna try a new project to get the same speed of bands and same last as tube. MY IDEA IS THAT the bands break because when u cut it with roller some micro break happen on the border. This is the reason why them break after some uses. While tubing (that are not cutted, except start and and) last a lot a lot a lot. MY PROJECT is that of... roll as tubes a whole piece of theraband bands light color as yellow, red, green or blue (this last for heavy ammo). Yes, an entire piece of band (cutted at start and end in relation to drawlenght) rolled with a little piece of glue in the corner (to prevent it open, so remain compact). My calcs show that u should get a very fast, not tapered set! To make this kind of set i should need a little tube diameter (like 4mm) and a piece of band. Put glue around all corner and then roll around the tube the band! Leave it dry and then remove the tube. Should i now have a very good and fast band set? The last question is, which kind of glue should i use? Thank you, hope u like this project!