Actually tubies are fine to use for commuting -- maybe not ideal, but fine. The main issue with them is not the flat repair on the road, but the fact that it takes longer to properly mount them at home. Also they need to be pumped up every single day (due to using a latex inner tube). You have some decisions to make regarding mounting. Tape is easier and glue is stronger. For most commutes tape should be fine. If you're doing high speed descents in hot weather with hairpins, then you'll definitely want to use glue. Here's what you do on the road:
(1) Carry a spare lightweight folded tire in your seat bag along with a CO2 inflator. The tire needs to be prestretched and preglued (if you are using glue). If you get the right kind of tire (something like a Tufo S3 lite 215g), after letting the glue dry you can fold it very small. You remove all air, then fold it in half on itself so the glued base tape is completely covered (tape to tape), with the valve at one of the two end creases. Then keep folding in half a few more times and it really is very small and will fit inside a seat bag.
(2) If you are using glue, leave a small area (two inches) with very little or no glue opposite the valve. This will make the tire easier to remove when you need to change a flat. For tape you won't need this (even with glue you don't *need* it, but if you do a really good glue job it will help make your life easier).
(3) When you get a flat simply change the tire and inflate the new tubie. Regardless of whether you are using tape or glue the tire will hold fine until you get home -- just don't go wild.
If you do these things, changing a tubular on the road will be as fast or faster than changing a clincher -- people who are good at it can do it in less than two minutes. It also has the advantage that you have a brand new tire as a spare, so you can recover from even massive cuts/holes. The difference is that with a tubie when you get home you will have to remove your temporary tire and then either repair or replace your old tire (you can also send it out for repair -- they will replace the tube inside), so it's much more work when you get home than a clincher would be. You can also just carry sealant but if you get a large hole then you better have your cell phone.
Sorry I can't help with the original question. I only ride tubies in races. I would suggest asking the question on the weight weenies forum (google it). THere are a lot of really knowledgable people there who ride tubies every day.