We moved into our house, built in 1920, this past July. The main newel post at the bottom of the stairs has multilple parts: an octagonal base, a round center portion, then the top (attached to the banister) with a cap. When I take off the cap I see a gear type thing and a square metal part. The center part moves/rotates when touched, the banister shifts sided to side and some of the spindles have started to fall out. The stair goes up all three floors.
Any idea of how to re-secure and tighten the post and banister?