Puppetmaster Magus and Concentration Duration

[Markov Spiked Chain]

I want to get some concensus on how the Puppetmaster Magus' "The Show Must Go On" ability works:

The Show Must Go On wrote:

When a puppetmaster has a creature under the effects of an enchantment spell and that creature has line of sight to an illusion spell the puppetmaster has cast with a duration of concentration, the puppetmaster can link the illusion spell to the enchanted target. As long as the target has line of sight to the illusion and is enchanted, and the puppetmaster has line of sight to both the target and the illusion, the puppetmaster can maintain the illusion as a free action each round. The puppetmaster can maintain only one illusion spell in this way

But it's not totally clear how much of the normal Concentration Duration rules the Illusion spell still follows. Do you need to make a Concentration check if you take damage while the spell is up? More importantly, can you cast other spells? I sure hope so.

I'm pretty sure the intent is to keep one illusion spell up as long as your enchantment lasts, and still be able to cast other stuff. Puppetmaster and regular Magus are both built around being able to cast spells on most of your turns.

CRB wrote:

Concentration

The spell lasts as long as you concentrate on it. Concentrating to maintain a spell is a standard action that does not provoke attacks of opportunity. Anything that could break your concentration when casting a spell can also break your concentration while you're maintaining one, causing the spell to end. See concentration.

You can't cast a spell while concentrating on another one. Some spells last for a short time after you cease concentrating.

[Johnny_Devo]

The further text of the ability here:

Quote:

At 13th level, the puppetmaster can maintain two illusion spells in this way, requiring a separate enchanted target for each illusion.

Leads me to believe that the intent is you can indeed cast other spells while maintaining the spell in this way, because the ability would literally be broken(in the non-functional way) otherwise.

However, I see no reason to assume you also no longer have to make the concentration check.

[Markov Spiked Chain]

Good catch! That's strong evidence that you can cast other spells at least. Concentration checks aren't too big a cost for semi-permanent illusions.

[Markov Spiked Chain]

Effortless Trickery seems to have the same issue. It also implies that you could cast another spell while concentrating as a swift action (since it says you could still use your normal actions to concentrate on another spell, which you could never cast.)

I could have sworn I'd seen another Archetype recently with a similar Illusion maintaining power. This feels like an overlooked rule that's broken some new stuff.