Can I saw off broken freehub I have a very old bike (circa 1996) with broken Shimano Altus 7 speed, hyperglide-c freehub. The freehub is freely rotating in both directions.
I had removed the cassette, but it seems that there is no way the freehub could be removed with allen wrench: there is nothing on the drive side and it seems like torx slots on the other.
Does it make sense to rebuild the free hub without removing from the wheel?
Does it make sense to take metal saw to cut part of the thing first and then unscrew the rest?
Update: I am considering this tool to disassemble and fix the freehub without removing it from the wheel.
Another update:
The view from the drive side 
The view from the other side, the hole diameter is 12mm, it seems like there are some slots there but I am now sure whether I need 10 mm wrench or something else.
I do not believe there are any from that era that don't take a 10mm wrench through the drive side.
The simple thing to do is remvoe the freehub with the 10, gently pry up the rubber seal on the back, note its direction, and shoot air/solvent/lube/oil/etc through it depending on what you've got and how bad it is, then finish with a heavier oil like Phil.
Edit: It indeed takes a 10mm allen.