I have only ported this map to CS:GO and claim no ownership or wish to relist Hardex's work as my own. He is the sole creator of this map and owns any rights related to it, however Hardex has approved of this port.
The nojump trigger_multiples of mdrn's stage/bonus have incorrect spawnflags specified on the player_speedmod. I've uploaded a simple stripper fix for server owners: https://share.snksrv.com/t/CgowPJ.cfg
As it stands, your weapons disappear whilst in the multiples, instead of suppressing jumps.
I realize the textures around 666 b4 start is buggy. It's due to a nodraw over the texture, which I only noticed after sneaK informed me of it. I'm not gonna bother fixing 2 separate stages, recompile, repack and reupload. If it bothers you that much, you can fix it yourself for your server.