I am building a new staircase in my home and it has open sides on both ends for first four steps. The right side is open all the way up with an intermediate landing where it then makes a turn right. I am using a double bullnose starting step and starting volutes for each end. My issue is that on left side my handrail will terminate into the opening to the other room's side. If this is centered in this 4 1/2" thick side, my baluster center line will be 2" off from one side to the other, as the skirtboard on that side goes up that side of wall. I keep the baluster lined up with outside edge of skirtboard. However, by terminating handrail into side opening, I have no other choice but to move centerline over 2" for the left side volute location as well as handrail location. Any thoughts on this as I have no other choice? I could see if the stair company makes a fitting for this 2" offset, but don't see how this would work out even if I used it for balusters that may end up in this area. I could move other side over 2" to match, but hate to reduce width of steps any further than they are now as the centerline for handrail can actually be put anywhere, but I don't like to loose 2 more inches in width on these.
One further question addresses correct way to apply side nosing. I made the treads and risers out of quarter sawn white oak. Applied nosing to front and now need to put on open sides. I cannot use any tongue and groove method often used on tables where exposed end grain shows as too late to do something like this. I was planning on gluing miter and using one or two bisquits in this tread and screwing and gluing by front miter tight and using elongated holes in other spot or spots with no glue. Will finish out with plugs over screws. Do you think this will stay put over time mitigating expansion issues which should be minimal due to type and cut of wood being used? Thanks for any and all suggestions and opinions.