Have you looked at pre made stair caps? I do them all the time. They come with returns already on the ends if you order them that way. Also have matching risers.
Their made specifically for going over existing stairs. You can either cut the nose off ( not recommended if tread goes into stringer) or build out the riser flush with the nose with plywood. I usually build out with plywood.
Their made specifically for going over existing stairs. You can either cut the nose off ( not recommended if tread goes into stringer) or build out the riser flush with the nose with plywood. I usually build out with plywood.