Brace height and nocking point are the two main adjustments on longbows and recurves. The rest is tuning the arrow, mainly tip weight and length to get the proper spine and turning the nocks to fine tune your fletching orientation.

One other thing you can do to your bow is you can vary the thickness of the strike plate to fine tune the bow's centershot. If your arrow spine is showing slightly weak, but the next arrow spine up is too stiff, you can go with a thicker strike plate. Or go a bit thinner for one that's slightly stiff. You can usually find bags of leather scraps of different thicknesses at hobby stores.