Having shopped for one of these repeatedly for years and years, the strongest piece of advice I’ve received is to make sure to not undersized it for your requirements. With chippers, its go big or don’t go at all, or you WILL find yourself regretting it, having to shut down the machine to clean it or clear jams, etc. Its just not worth it to get the undersized units. If anything, go oversized for what you think your needs are going to be.