It really isn't about what Felder says at all and the fact it's wired with 12Ga, it's about what the Electrical code says in a individual's country. Like I said previously. If you have even a slight understanding of the Electrical code you will get the concept, it's not whether the machine will operate on a lower amp circuit it's about the safety aspect, especially in your home. As always do as you please.
There was an interesting discussion on the first FOG about a member who also checked Felders electrical requirements before buying a widebelt sander and the power it was going to take to operate. He had the electrician wire what Felder said it needed and when the machine arrived and was hooked up, the amp draw of the machine far exceeded what they (the Felder Rocket Scientists) told the customer. Needless to say alot of problems and downtime for the guys business. He was unable to upgrade the circuit with the existing power on hand. Long story short, those same people are telling you to go against code. The happy ending is that because of the Felder BS they are taking back the machine and he's getting a unit that will work.