I had no problem calibrating smaller printers as long as they can print A3+ page. You can find instruction for this here is you search LULA.
I've tried both APS and the Color Center and when I have been able to get the z3200 to read the chart, I've been unsuccessful in turning that data into a usable .icc profile (the results were strange at best.) Today, I decided to launch into this again for the first time in about a year (maybe twice a year I get motivated to try to make this work, pull my hair out, and decide to let it rest since most of my printing is done with the z3200 any ways. The a3+ printer is a paperweight at times, albeit a large one. When you profile other printers, are you using APS or the Color Center?
That leads me to:
I do it quite often, yesterday I profiled 5 different papers for the Canon Pro 1 using the Z3200 spectrophotometer. I wrote a tutorial about it a few weeks ago: http://forum.luminous-landscape.com/index.php?topic=114961.0
Good luck.
I do appreciate your tutorial. Unfortunately, having fed multiple iterations of the charts into the z3200 today, I've come to a grinding halt at the same step every time: the printer is declaring that there is an error with the scanning process right at the beginning and spitting the page back out. It didn't seem to matter which chart, either, which was odd (first I tried the 729 patch chart on 13x19 paper, then when that failed, the 343 patch chart on both 13x19 and 8.5x11, and finally tried the APS HP 1.5 chart on 13x19....same results every time. I did try advancing the paper so that the chart was right under the rollers as you suggested in your tutorial, so I'm a bit lost on why I was struggling to make this work today.
I should note that I did some further experimentation today: I've been using the Adobe Color Printer Utility but I also tried to print within Lightroom, switching to the printer's color management and then turning the color matching off in the printer dialog. I suspect that the colors from the Adobe program are likely better but I thought it was worth a try just to have more control over margins. I also played with different output sizes for the actual charts.
When you use cut sheets, do you ask the Color Center to make, say, 13x19" charts or do you tell it 12x18" or some other dimension to account for margins? I imagine you don't go borderless since print drivers enlarge the image to make that happen, and the Z3200 doesn't seem to take kindly to changes in chart size.
All that being said, I really did appreciate the trick about feeding sheets in through the roll slot. In my years of owning this printer I've never tried that and they feed in much more nicely than in the sheet feeder!
Addendum (added 6:25pm EST):
I take back one part: the HP RGB 1.5 chart (one of the defaults in the HP APS) profile finally profiled....some dummy forgot to trim the page where the little cut lines were printed. If you tell me that I should have done that for the others, I may need a beer and try again tomorrow! (And I know the 1.5 chart only has 288 patches, but I wanted proof of concept before moving on to a larger chart)