My position may sound nuts to some, but I chose some of those items for specific reasons:
1) Moving vans, fertilizer, diesel fuel -- Timothy McVeigh -- 168 killed, including 19 kids who were in day care that day. (Though I think TM used racing fuel, now that I think about it.)
2) Box cutters -- 9/11 -- Thousands dead.
Between those two, number of firearms used to kill in the incidents: 0.
Frankly, it only sounds nuts if you are unable to articulate the reasoning behind them.
I'm a lawyer, but I'm not your lawyer. If you need some honest-to-goodness legal advice, go buy some.