Your talking a broadcast srpeader.... The problem with many is the dust gets in the motor. I went with a cheap buyers too. I removed the motor cover, hosed it off with water, sun dried it, and WD40'd the motor afterwards. Also, the spray gets all over the back on my ATV.
Debated long and hard on what to do. I bought a 3ft wide gandy drop spreader and a 4ft tow behind cultipacker. Litterally a few weeks after getting the 12v one. I am narrowing the cultipacker down to a bit over 36". I am making the hitch connection up high and long. The gandy spreader will be right infront of it.
I've used the gandy spreader, a billion times better than a electric broadcast. Got one used for $150, but was a custon one, so I needed the metering base for another $200. worth it.... Can do powdered lime easily now. The triangular feed meter openings did a batch of rye for me just fine. although the rye variety looked a touch on the small side to me. Will be doing oats next weekend with it. They're usually bigger than rye in my experience.
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If going the 12v broadcast spreader route, I am thinking swisher would be the best bet....... They survive salting driveways for 2-3 years for the guys doing driveways in the winter. If not buying a good one thats 12v, get a tow behind one. Keep in mind they might get tippy.
Clover spreading........ Clover plus larger seeds, over time the clover seed bounces down to the bottom. Mix clover seed, larger seed, and pelletized lime and/or fertilizer. The heavy coarse edge particles keep the mixture in suspension. done it as long as I have been food plotting. Looking into making a mixing barrel. throw your stuff in for the batch, cover the lid roll it on the ground a few times, it's mixed. sick of the dust.......... been sick from the dust before too........
Overall, pure clover seed spreading, the only thing I have found was half decent and didnt over pour was the solo 421. At first I hated it, couldnt spread fertilizer or lime. Useless to a food plotter...... Then I gave it a shot with frost seeding last year's clover. That's what they made it for, spreading pure seed. Litterally, anything else will just pour too much seed in. I used to buy 2 or 3 bags of pelletized lime for a 1/3 acre food plot just to thin out the clover. Of course the ground dont mind a bite of lime either...... Another option is using sand too. The nice thing about pelletized lime, is you learn the broadcast rate pretty quick when liming a plot. then you can take that rate, add your small clover or turnip seeds and have a pretty even stand.