How can I get my 'Logan 5000' bevel cutter to be more accurate?

FoamWerks Foamboard Straight/Bevel Cutter (C)

Logan 5000 Mat Cutter for thick mountboards

FanFlex: Lightweight flexible crests and patches that fold easy. - FanTex: An all-new super comfortable soft fabric. - FanFit: The authentic on-ice

Logan 5000 8 Ply Mat Cutter

Logan 5000 8-ply Bevel Mat Cutter

How can I get my 'Logan 5000' bevel cutter to be more accurate?

Logan 850 Platinum Edge Mat Cutter

Ultimat Futura - Keencut

Logan 5000 8-Ply

FanFlex: Lightweight flexible crests and patches that fold easy. - FanTex: An all-new super comfortable soft fabric. - FanFit: The authentic on-ice

Logan Graphics 4000 Deluxe Handheld Pull Style Mat Cutter, Silver