Where to get an upgraded 4.3 nozzle

[Ozone06]

First I'll get my Flame retardant suit on.

Second, I've read some of the 60 pages of the Hi capa FAQ, and I'm still coming away with questions.

So with that I picked up a 4.3 hi capa with upgraded springs a couple weeks ago and well after doing a bit of reading it seems a good idea to get a metal slide on the thing before something bad happens. I have not put any rounds though it yet personally.

I'm fine with having the plastic slide but with the higher pressures of propane I've been reading that isn't a good idea so it seems like it would be prudent to get set up with a metal slide before it asplodes.

From what I'm reading 4 things need to happen to upgrade to a metal slide.

1. Better springs... Have.
2. Upgraded nozzle... Looked and can't find a retailer anywhere.
3. Slide... There's options, most likely I'll buy from Illusion
4. New outer barrel. possibly.

Now I'm very happy running guns stock, My school of thought is yeah my FPS is lower but my gun stay up for the fight. I would like to have the same thing for my first pistol but as I mentioned before I don't want to run around with a flammable, compressed gas, safety issue strapped to my leg.

Contrasting that the slide and the Fixed outer barrel, that Illusion sells, alone cost more than the gun itself, and seem prohibitively expensive... or am I missing something?

So the basic questions are:
1. Should I upgrade? (Loaded I know)
2. If I wanted a 4.3 upgraded nozzle where do I go?
3. With the large initial outlay is propane worth it, when I can pay a bit more and just use duster/green gas.

Thoughts?

Thanks!

Ozone