One Dull - One Sharp! TIP

I have one #1 X-Acto handle.
I usually keep two blades handy, one dull with a broken tip and a second, new sharp blade.
I switch back and forth between the two blades.

The dull one on the left is used for scraping and laying CWF in the seams on body tubes.
The sharp on to the right is used for fine cutting.
I still use the break-off blade for the majority of cutting jobs. I switch to the X-Acto #11 blade for tight, exacting cuts.