First of all: Don't worry, be happy!
-the technical thing: there were panzer III, IV tracks where the guide teeth were not hollowed. don't beat me, but I am not sure if these were late or early ones, but I think they were late ones.
-next question: are these the more sophisticated ones? DML offered 2 version where the difference are hollowed outer edges ( or so ). I also expected hollowed out guide teeth from this version...
-building them is not that bad..
I take a long piece of marble when I glue individual tracks to have
a.) a flat surface for the tracks
b.) there is always a bit of glue squeezing out and gluing the tracks to the working surface,
but they don' t stick to marble..
the ejector pins are not that bad. all my boxes contain tracks with raised pins, which can be sanded down easily. I hope urs are as such also..
I put all cleaned tracks in a box and glue them together as follows.
when available I take the vinyl kit track as scale for the lenght.
I take 4-5 tracks and stick them together by pressing down one track with the left hand and adding the next track with the right hand. I use a J-shaped tweezer, which holds the track at the guide tooth and snap it together with the other track.
after 4-5 tracks I start adding liquid plastic glue to the track connections and then lay the part aside and start with 4-5 new ones.
if this segment is ready I glue it to the already finished part.
if the whole track is finished, I check if all parts glue together well and I let it set for antoher 10 minutes.
Then I wring them arount the running gear ( upper hull is not installed ).
before this, it is recommended to take a 10-15 tracks long part and check, if the tracks fit to the drive sprocket...
the time for this exercise is about 3 hours..for both tracks..
regards, tankbuster