when is there HP damage for avoiding urination (Quick and Dirty Enchantment)

[Plane]

M17 rules allows you to enchant 100 energy per hour, so for example if you wanted (M27) to make the better "Ring of Body of Wind" for 3500 energy, you would need to be enchanting for 35 continuous hours.

As far as I know, Quick and Dirty Enchantment requires a lot more focus than Slow and Sure. You can for example cast other spells while doing Slow and Sure, there's just a -3 penalty for maintaining your concentration on that day's enchantment.

It's probably constant Concentrate maneuvers, meaning if you stop making concentrate maneuvers, you would have to start over the QADE process?

If that interpretation is correct it begs the question of what you can actually do, since it wouldn't cover anything you'd normally require an Attack or Ready to accomplish.

I'm pretty sure to do something like remove your pants (which many people do to urinate in a toilet) would require something akin to attack (Grapple your Armor, Break Free that armor's Clasp CP to undo the belt, etc) or just folded into a Ready - in either case unless you have Compartmentalized Mind it seems like something you wouldn't be able to manage while still keeping up the requisite Concentrates on your spell.

While a GM might allow something like "wet yourself as a free action" for those who didn't want to do this (ie 'hold it in' for 35 hours) do we know how long someone could do this before they started to take HP damage?

From reading it seems that people tend to be able to hold 10 hours' worth of urine before the bladder begins to stretch uncomfortably, so I'm wondering if we might use similar rules to sleep loss (which you'd also be using for 35-hour enchantment unelss you had Sleepless advantage) except instead of B427's loss of 1 FP per 6 hours "staying up late" it could be losing 1 HP per 6 hours "missing an evacuation" ?

Plus the "will roll to avoid falling asleep" could be replaced with a "will roll to avoid incontinence" where failure means you wet yourself to avoid taking further HP damage.