I blew my modular's fuse from just changing my a148's jumper settings
and then switching it on... I thought to myself "ah, I'll just buy
another fuse and she'll be going again!"

Problem is, finding a 250v 315mA slow-blow fuse is a LOT harder to get
than I imagined... well in my town that is. No one here knows what a
slow-blow/time lag fuse is, let alone what even a modular synth is.

I found a similar kind of fuse in my Akai sampler, but it's around
1.2-1.6A. Would my modular be able to handle it (until I get the
proper fuse of course), harmlessly blow it or will it act just like
the dreaded chewing gum paper trick and turn my modular into an
expensive firework