I’m trying to decide between a FX Royale 400 0.22” or a Royale 500 0.25”. I like the removable tank of the 400, but the FX site shows the 500 does not have a removable tank; can anyone confirm that. Is it an easy overlook for the non-removable tank (assuming FX site is correct), to favor the extra knock down power? Also if anyone has had problems with the 400 or 500 I’d like to know about it, how was FX customer service and how long did it take to get the gun back if applicable. I’d like to get the Impact, but it’s 3-4 month wait at the moment.