Alan,
You may want to exercise a little caution with a loop and side-nocks. I'm not saying it cannot be done but Joe Gibbs related a salutary tale to me about the time he tried it and it pulled the limb to one side and as a result tore it clean off

What about double-side nocks and a loop akin to the nocks on a selfbow? However, to me you would not gain the advantage of the spreading of pressure and, if cut-through to the wood cone, the ability to hold the horn on with a noose/bowyers knot.
Sorry for digressing from Marc's lovely bow!