Starch is on my shopping list - I want blocks as nice as yours, Honchey! But I don't think it's so much the bias edge sewing that's messing me up on this block - all my other blocks so far have been a breeze. I believe I'm starting the sewing of the two-piece sets at the wrong end - leaving me without the seam allowance needed for the large points. My large points ended up at the edge of the sewn strip instead of offset by 1/4". I have fixed it for the two large strips down the sides, and now I have to fix it for the smaller pieces on the top and bottom (in the middle of the block.)
I'll probably take a photo of the "before" block (the one currently in the trash can) and the after block - as long as no one laughs at the pathetic "before!"