I`m more concerned with that colour-match... a pic of your side hair and the system hair taken in good natural light would be interesting.... it`s hard to really see the knots unless you get excellent focus on the camera...you`d have to part the hair and take the pic down through the hair --I think you`re stressing over knots unnecessarily --- that`s one of the problems with forums..... I`m not saying that knots /visibility from too-lightly bleached is not an issue for some guys, but newbies can get kind of bogged down in all kinds of issues from reading so many posts/threads and kind of imagine that their first system will have all kinds of problems...again I`m NOT being dismissive of anyone or being patronising in the slightest, and I know that issues can and do arise ..in your case Eric, I`d be far more concerned initially with the colour-match thing if it`s big.... the knots [if they were actually `present`] can be dealt with in time [ but BEFORE the application of knot-sealer as this will `seal`/coat the knots in acrylic which the bleach will not penetrate should you wish to use it] Just deal with one thing at a time.... if the fit is good [again no reason why it would be `off] and your density/ventilation is good, they are the main things.... a nice `style` ...the other things can be tweaked if needs be......