I have a mix of standard and XL sized tanks to use so it's not a big deal. I can always take a couple of standards with me instead of a single XL since cartotanks are actually less likely to leak than other tanks.I tried the single (2mm) hole XL Boge cartos and they're way too airy to even waste a tank of juice on.
Now I have some double punched XL Boge cartos and they work ok but barely.
The normal sized Boge double punched work great for me.
I think I've run 30-40ml through a couple of them.
Want to buy a metric .... ton of XL cartos and transparent XL tubes for Kir Fanis tanks?
Bummer because I like the idea of a 5ml cartotank but the XLs don't work for me.