I also like the idea of a prospective knight requesting sponsorship from current knights, maybe not three, perhaps a primary and a second, w/the KC performing the Accolade, in the presence of all of the knights, if at all possible.
In fact, that could be one of the events for which we all assemble...
It's not a bad idea, and a lot of orders probably work that way. However, I'm cautious about requiring the KC to be present for everything, since a lot of what the group does should be fairly autonomous, IMHO. If we elect someone, and that person ends up having a busy work schedule for the rest of the year, I don't want that to hold things up. Maybe that's not really an issue, and perhaps it's better to keep records of things centralized by having it go through one person. We'll just have to decide. This also plays into how we deal with more distant members.
Ideally it would be nice to have as many knights as witnesses as possible, but I think only a small number should be required for the ceremony itself. Preferably the knight's original membership sponsors would be there.
The thing I like about having three knights required for the accolade is that it will help against having a couple of knights "power-leveling" a friend into the system, so to speak. Two knights can sponsor someone to join, but they still have to get a third (or even three separate knights) before the accolade.
What would be cool (though expensive) is if we were able to gift the new knight with a set of spurs. It would also naturally fit the three-knight ceremony, since one can be performing the accolade itself with the other two attaching the spurs, and so on. We'll have to think about the elements we want to include. Historically the accolade ceremony often included knights putting the spurs onto the new knight, and also girding his sword on. The one performing the accolade would of course "dub" the new knight with taps from the sword, and frequently there would be a firm strike at the end of the ceremony (a hard slap across the face, or punch to the chest). We can use any or all of these, and read up on additional elements we might like. (I think De Charny also describes specific clothes, like a purple mantle, white tunic, black hose, white belt, etc).
Something that would be easy to add is a certificate that can be framed, and have it signed and dated by the knights performing the accolade.