Board Thread:General Nerf discussion/@comment-38362264-20190131201218/@comment-26431461-20190201010417

Like Thiefy said, you'll need a soldering iron for a LiPo mod. You'll need to at least allow the Stryfe to accept LiPo batteries with an adapter, which you'll need to solder in.

So if you don't have a soldering iron, I highly suggest you invest in one (but with your parents' permission and supervision).

As for that rubber thing, I think it's called a "dart skirt" and it is completely useless, so if you removed it, that's fine.