sure you can have them all if you want, the other 3 variations of
#148 are on entries #168 #169 and #170
i also have it tested, i've print the logo and it looks good, the tagline is on 40% black and readable very well, i also try to increase it become 50% black but i see 40% is the best.
Please feel free to ask if you need to see other changes/revisions, i'm here to do that :)