Afternoon gents, 1st post and I am renovating my full house, doing the hall just know. I am a sparky to trade but fairly much retired now, although I always keep myself busy. Asked this question on another forum but can’t be any joiners on it as no reply. The house was built in 1962, it had a Parana Pine staircase which had a ranch style banister / balustrade with 45x90mm posts half lap jointed onto stringer with just a plank top and middle, you know what I mean. So stairs sanded back with old spilt paint and old horrible dark yellow varnish sanded away back to the bare wood and a satin floor varnish applied, I think it looks good even if I say so myself. Next stage in the plan is to create a newel post top and bottom with a stainless steel bannister with glass, screwing the glass clamps straight onto the stringer. What I have done is join two of the 45x90 posts together by biscuit jointing and glueing then put it through the planer thicknesses to tidy it up. This has created 2 off 87x87mm posts. My question is the attachment of these posts, the top post I chopped out a slot and fitted it over the stringer, is it just a case of putting 4 off 5x80mm stainless screws through it to secure. The bottom post I need to fit onto the first tread, so do I just repeat the same process as the top post and screw through both legs of the post and stringer? Stringer is 45mm. I need to attach to first tread to bring bannister length down to below 4000mm which is as long as I can get the bannister. cheers gents for looking.