So, im looking to go to an HPA setup or get another gun with one. Im tired of teching on and the inconsistencies im getting on my AEG the passed year. I have some questions regarding the HPA system.

Im curious on SLP vs normal, I see them on the kits on amped and airsoftjunkiez. I know the difference is output pressure, but dont understand what it means.

When it comes to lifetime of the tanks. I see that they'll last 15 years but should be hydrotested every 3-5 years depending on the material. I was looking at getting a standard HK tank which is like $55. For Ninja to hydrotest them it seems about the same. Is there a point in hydrotesting that one vs just replacing it. I get the carbon fibers are like 3x as much and clearly are worth it, but the base cheap aluminums it doesnt make sense.