New Janome Foot

I just got my new O2 foot in the mail for my Janome 7700 Horizon. I haven't tried it out yet, but in comparing it to the other O foot I did notice something that had been brought up in the last Janome 7700 digest. Markings on our machines. Well they aren't on the machine, but if you look at the left side of the 1/4" foot (either one) there are three raised lines. One is exactly to the left of the needle, the other two are both exactly 1/4" behind the needle and 1/4" ahead of the needle so you can use those to help you know where to pivot, start seams, etc. I bring this up because I have been using one of these feet for years and have never noticed the markings. If you need to see them better, a dab of fingernail polish should help visibility. Just being aware of them will help.