For the talent Jury rigged,

When it says 1 Improvement (what are the options it can use for improvement? Can it be given a Quality? or what?

and it says "while it remains in use" does that mean as long as the character has the weapon? Or ony while he has it readied? So if he switches weapons the quality goes away?

Can this be swapped during combat? Does it take a Maneuver to do so? Or does it have to be declared while out of combat?

You should take a look at the longer description of the talent in the Talents chapter. It goes over all the possibilities with Jury Rigged.

Actually, most talents have more detail there and it should be the only point of reference if a rules question comes up. Essentially the descriptions in the trees are short hand.

Pg 138 answers pretty much every question.

Only oddball is technically it looks like the moment an item is lost/destroyed you can immediately apply it to a new one... So Jury-rigged grenades are a thing?

Only oddball is technically it looks like the moment an item is lost/destroyed you can immediately apply it to a new one... So Jury-rigged grenades are a thing?

Why not? I jury-rig this grenade, and then use it. And then I immediately go and rig another jury-rigged grenade, and then use it. And so on.

You have to roll for each time, which means it is considered an Action, I believe. But it makes sense that you could immediately go jury-rig something else right after the previous jury-rigged item is gone or used up.

It doesn't involve a roll, but it modifies an Action, which would be a no roll mechanics check, so it's an Action I'd rule you could do so in between each turn. Of course I'd also upgrade the Difficulty on any use of Jury Rigged explosive devices made under the duress of combat cuz I'd really love to see a Despair....

In a game I was playing in I worked it out with my GM that I could jury rig 4 grenades at a time. If I used them up I would have to take time to sit down and jury rig some more but at no time could I have more than 4. It worked well for us.

In a game I was playing in I worked it out with my GM that I could jury rig 4 grenades at a time. If I used them up I would have to take time to sit down and jury rig some more but at no time could I have more than 4. It worked well for us.

IIRC, per RAW, you can have one “Jury Rigged” item per rank of the Talent that you have. If you have two ranks, then you can have two Jury Rigged items at any one time.

So, with regards to grenades, maybe a Jury Rigged grenade launcher would be a better idea than a jury rigged grenade itself.

IMO, YMMV, etc….

Yes, Brad you are correct by the rules as written you may have one time jury rigged. If you actually take the time to read the post you will find that I mentioned that I "worked it out with my GM". To those in Rio Linda this means we went outside the rules to something that made sense for our game.