i would wait another day, a little trick i use is, put your feed say 1.5ltrs into a 3ltr container with a lid on it and shake the fuck out of it to get plenty of oxygen into it, your roots will love it ;)
i would back off the nutes a bit because of the burnt tips, the 4 fingered leaves could be a genetic thing or something went wrong when it germinated, if i crack 20 seeds i usually get at least 1 mutant
this is just a saucer to catch the run off its doing no harm
check on the underside of the leaves with a loup for bugs or eggs, i always feed veg nutes till the end of week 3 until the stretch is over as their still using a lot of N, what are you ph ing at