Yup, here you go:
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Sheep load in from the far end, have a sorting gate as they enter so can draught out ewes if we want to drench lambs etc, also really useful after drenching lambs as they tend to turn round in the race so acts as a quick exit (opens both ways) We usually just start at the end, open the door as we pass then race is empty by the time we do the last lamb.
another sorting gate half way so we can run big groups through to take a few out, having a short length of race before it means you get a chance to see what's coming.
Then at the end (closest in the pic) a concertina gate with another sorting gate behind it, so we can get a raceful in, pick through what we want out, then sort.
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Also have a length of sliding rail above to carry drench bottles, and have shearing machine on it for doing tales in the race, saves a lot of turning sheep over!
Keep in mind this is for 1200 sheep + lambs! 30 sheep does not require anything like it, two hurdles with something you can open and close at the end would do.