I ignore nothing from the OT. It was written for our understanding.
Romans 15:4 For whatsoever things were written aforetime were written for our learning, that we through patience and comfort of the scriptures might have hope.
But I only look to the NT for authority in worship.
What other parts of the old law do you keep? Dietary restrictions? Stoning of someone who works on the sabbath? Selling your children into bondage?