Deepening nut slots without nut files?

In this video, I will review the Hosco brand guitar nut slotting files Help support this channel

Guitar Nut Files · 13 Sizes Guitar Nut Slotting File Saw Rods Filing Repair Tool Luthier Kit Bridge · 4 String Bass Guitar Nut Files 45-105 Gauge

nut slot depth Convenient set of 6 nut slotting files; Tempered edge-cut nut files produce round-bottom slots for nuts and saddles; Each chrome-alloy steel file has twin 4

nuts and bolts slot We've been using these double sided nut files from Stewmac Image but we're not overly happy with them as they leave a V shaped slot