I LOVE the Nerf Rotofury. It is a solid 8/10 when it comes to comfort. I only have two problems with it.
1. The 'sling point' under the cylinder gets in the way when slam firing. I end up mashing my thumb sometimes.
2. It doesnt have a stock! You just want to shoulder the thing. With out a stock you cant do that though!

So I am working with my highschool engineering teacher to 3d print a new stock. THe first thing I had to do was make a rough model. So I made it out of blue insulation foam. It is a very wide stock as I have incorporated space to hold 20 Nerf Elite darts. I am converting this thing to fire Elite darts. Now I am working on getting it modeled in 3D so it can be printed!

FREE STUFF----> http://www.furaffinity.net/journal/7230695/