Could be Lowell is absolutely correct, could also be the core group here is technically savvy, understands FET (whatever that is) spoke gauges, voltage into a controller, drain brains and watts up, etc.
But, there are a few of us that know diddley squat and maybe even less and peruse these forums in the hope of gaining a little knowledge and simply to know there are other electric bike folks out there. In my case, only for an example, I bought a Phoenix Cruiser Kit complete with EVERYTHING including a rack, bags, cruise control, etc. I've learned to dump the rack and get rear side baskets, get a watts us (hasn't arrived yet) and to change my tires to slicks and am learning more every day.
Just as soon as I find, for sure, the right batteries I'll probably dump my four
SLA's and get something that will give me much better range. I really don't care too much about the dollars, I want the quality without being wasteful about it. Without a kit I'm not sure I would have gone the way I did and so far I'm very happy with the kit and the performance.