Has 50+ chapters right now.
NU Link-https://www.novelupdates.com/series/genius-regressor-makes-mythic-items/
Sorry for is way to laten but just recently found this post. There already a EPUB/PDF version of this novel. You can find it here in case you don't know yet:
http://www.vn-meido.com/k1/index.php?topic=10715.0 (http://www.vn-meido.com/k1/index.php?topic=10715.0)
~Happy readings.