Openbeam compatable Mitre 90cutter heavyduty v2

Use this to cut openbeam nice and straight.
Heavy duty so it wont break easy, unlike the thin versions.
Difference from my version 1 of this , this one keeps
the beam tightly held at the bottom of
the mitre.

Note:
Print with full supports to keep inside uniform.
Some Filing top and bottom of inside may be nessesary
to get a good fit.
V3 added, it is 0.3mm taller inside, easyer to fit onto beam.
I found V2 alittle tight fitting.
V4 added. a full 1mm taller inside.Use this o