I'd give it a little more time personally before you start. If you look at picture 4 there's trichomes yes, but if you look real close you can see just the stalks of trichomes without heads. The heads are where the thc/cbd resides, so having that many still trying to develop I would honestly say to wait it out until week 8.
Basically the more resin gland heads the better, regardless of percentages really. The best analogy I can think of is, imagine paying for a slice of pie, and you only get the crust and some of the good part of the pie. Yeah it probably still tastes good, but won't be half as satisfying as the full slice, and since you paid for it you deserve to get a full slice.
Lol pretty lame analogy I know but I tried, hope this helps Grazz.
By the way those buds are looking great Grazz, keep up the great work
.