What about this heavy artillery I saw.. Friend of mine bought it.. and first I said when took it in my hands: what a job You'll have above all other high intense workload ( he plan to use it for royal jelly..).
http://www.charliebeekeeping.com/CQR-3-queen-rearing-system
About nicot.. I know couple beeks which had problems with it. Personally never tried.
I use jenter which is similar, also my mentor use it a lot. We use it with cloake board method and have no issues. We wax the insert cells, not sure how it would go with nicot, since in nicot insert cells and cell cup are in one piece.. When queen lay into jenter, it lays into normal size cell and later is attached to insert cell which is wider as queen cell. Maybe is that also the reason the queen unwillingly lay into wider cells of nicot?
Quote which could depict why we over here for ourselves use mostly kits and no grafting:
" Proper nutrition is critical and will determine if the caste of a
fertilized egg will become a queen or worker. The age of larva chosen to be reared as a
queen is also critical. Larvae should be grafted within 24 hours of egg hatch. Larval age
affects the quality and quantity of royal jelly received. Initially the diet is high is sugars,
stimulating a high rate of feeding. As the larva grow, the diet changes and increases in
protein content. The queen larval diet affects queen performance, influencing; queen
weight, the number of ovarioles, and the size and volume of the spermatheca. "