I’ve watched so YouTube videos that show very narrow strips for the sashing. I’m sorry that I can’t recall the names right now. One was a quilted from either Australia or New Zealand & she had detailed descriptions & closeups of what she did. I bought a Craftsy class with Marti Michel & I think her front strips are about 1/4” wider than her back ones. Both are very narrow & she folds them over & presses them before sewing them to the blocks. I don’t think she’s shown a block with points using this method. If your strips are narrow, it seems to me you wouldn’t lose points any more than with regular sashing methods.