Had planned to reply. Saw Earl beats me to finish line and that's fine, saves me some work. Plus mostly agree with is comments anyway.
The only observation i have with the vent is that the area chosen by user is below the min. recommended by Winspeakerz, this by a notable margin of 10.5 or so sq. in. (34.2 min. recom. - 23.86 sq. in. from user tube).
The 14 cm (5.5") vent meets JBL's old rule of thumb of one third driver diameter, however since it was enacted years ago it may not be enough anymore for more modern high power drivers.
At high drive levels that port might experience some difficulties. The cab won't turn into a pumpkin for this, simply important to know and drive accordingly... 2235 Pe 150W; 2226 Pe 600W. The software takes that into account.
Btw if the OP can high-pass filter his woofers at say 35 hz with steep slope he might be able to improve somewhat his power and excursion situation shown on the graph.
Pic shows, like in post #13, 2226 in 5 cu.ft. box tuned to 40 hz, 300W, but this time with the vent details based on user tube dia. (i get same length as Earl), but vent area is the concern in case he's ambitious power wise.