hlc is a medium flat concave for the most part.
i recently bought a 3-pack of blanks from a polish manufacture called locals. i ordered the 8.3s, which are 32 inch long and have a 14.25 wheelbase. i'm pretty sure that they use one mold for their blanks so every size has that wheelbase. they are pretty cheap, 3 boards cost 400zł shipped which is about 100 dollars, but you have to buy griptape separately. they are pretty mellow, labeled as medium, pretty similar to the dsm mellow concave/steep kick but with flatter kicks. round nose and tail, definitely not pointy but not square either, nose a hair over 7 inches, tail around 6.7. i only skated one of them so far but it's over 3 weeks old and still holds up, it's pretty snappy for an old board and didn't chip or crack or anything. the dude that runs the manufacture (og polish skater) has been doing it for over 12 years and the boards weren't all that good at first but seems like he got it down. if you're in europe and into blanks then check em out
https://localsskateboards.com/some photos:
the board 2 sessions in, set up with venture 5.8s and 58mm classics

shape w grip

the whole stack, brand new

i know he also does orange, purple and natural stains for his blanks, but looks like black is the most common. those are two different shades though, one has like a green tint and the other has a red tint. a homie ordered another 3 pack and he got 2 blacks and an orange. if you want to see the concave dm me and i'll take some photos and send them to you on insta or something, i don't want to fuck around with imgur again