nerfpower97

I'm about to sell my stock 4k for $35. I want to sell it for extra money but I want to mod it pretty bad. Can someone who is experianced with 4k's help me decide what to do? I'm trying to figure out if it is really as amazing as everyone says. I've done quite a bit of research on it and everything says that it shoots crazy hard and it is just an overall good primary. Or maybe I should get a offer, please help.
-NP97

Just wondering if there is any fellow nerfers in northern Virginia. Here's a list of cities around me:
Manassas
Gainesville
Fairfax
Haymarket
Centreville
Prince William County

Reply if you are near me and state your age, I'm looking for nerfers in middle school or high school.

.

USER WAS WARNED FOR THIS TEST

My friend (noob modder), singled his first longshot with my help a while back. Anyways, he lost his trigger catch and I can't find any replacement parts anywhere. He doesn't want to buy a OMW kit or a new longshot. Is there anyway I can make him a new one? Maybe craft something out of a night finder catch or something like that? I don't really want to buy any special material for this, but maybe I could make one out of household items or typical modding supplies?

Ok, I'm a pretty experienced modder, but I have no clue about tubing. My local lowes supplies me with 1/2 cpvc and it is just way to tight for my FBR and stock darts, so I've been looking for a new barrel type and PETG seems to be pretty popular.
Questions:
1) Does PETG fit into cpvc or pvc couplers and other attachments?
2) What does thick walled and other thickness terms mean?
3) How is the fit of PETG on stock darts (which is basically the size of my FBR)?
4) What size PETG is best? For stock darts? Tightest, loosest, etc.
5) How can I achieve PETG and what is the average pricing?
6) How durable is PETG?
7) Will hot glue work effectively on PETG?
8) In what ways is PETG different than cpvc? (Besides that it is clear and a different material)
9) Can you get a tube that has the same outer diameter as another tube but has a different inner diameter?
10) Is there a way I can get looser cpvc to where I don't have to bother with PETG?
Thank you to anyone who takes the time to answer these.
Sorry to any admins if I'm doing something wrong, I've never posted before.