Little advice:
There is a glitchy invisible wall, before ex3 and lower. Inside the house, where is item located, close to exit, you'll get it. Just avoid wall, we accidentally found it with batnik.

There is NO WAY to fix it through stripper (to be honest, I tried), because invisible prop is a brush itself, which is linked with func_wall_toggle entity's with the same names. It will be fixed in next version, sorry for this.

Hyperscroll allow?

First test was successfully finished.
But we faced some problems instead, so at this test, here is new (EXPERIMENTAL, TO BE CORRECTLY BALANCED IN FUTURE):

- Buffed all bosses HP (due to new collision it was extremely low on all bosses), up to X1.9 - X2.2 (but Scorpion is buffed slightly to ~+28%).
Sephiroth hp, bahamut hp on bridge is NOT changed.

- Buffed bahamut attacks:
Wind +2sec
Gravity +2sec
Fire deals X2 damage
Electro deals X1.5 damage
Heal now heals 300 HP, instead of 150 HP.

- Now sephiroth will take slightly more damage, if player dies on laser (150 > 160 HP).

All of this is done by stripper.