hello, I do have experience w/ conures as I have 4 : ) so nice to hear that u have done a lotta of research on them and still want one! lol most ppl can't stand their loudness, so I do hope u are ready for that! however I have found that certain things help greatly w/ conures & their behavior. and a cage is certainly one of them. the bigger the better! they are extremely playful & needthe space & toys. for a min. size I would 24in-24in-36. that is MINUMUM . as for the spacing, I can honestly say I have never herd of the bar spacing u have

hmmm 5/8 is good. so I guess a little smaller isn't such a big deal?? idk...just sounds odd. maybe u could post a pic of the cage? w/ the rest of the dimensions? don't want any toes or beaks caught, tongs either! not big enough to get heads, leg stuck too. so spacing is really important.