I built myself my first cab, 1x 12 with a fully enclosed back. Now I've finished i think it sounds better with a partially open back.

Has anyone ever used one or two of those tubular ports that speakers sometimes have? Or anything else for that matter or do i need to make a new 3/4 back?
Takethe back panel off and cut 1/3 of it off.
2002 PRS CE22
2013 G&L ASAT Deluxe
2009 Epiphone G-400 (SH-4)
Marshall JCM2000 DSL100
Krank 1980 Jr 20watt
Krank Rev 4x12 (eminence V12)
GFS Greenie/Digitech Bad Monkey
Morley Bad Horsie 2
MXR Smart Gate