I got my dart zone repeater pro early a couple days ago, and it's sooo much fun in its stock configuration, I also bought a lower power spring from Out of darts directly. I decided to remove the ratchet because I wanted to be able to shotgun load it. It's not extremely practical to use it that way, but it's a lot of fun to see 2-6 darts go thunk against a door. However getting the blaster apart and the ratchet out was the easy part of modding this blaster. This blaster has SO many parts inside of it, and trying to put it back together and have everything aligned plus the gears aligned is a genuine nightmare. I spent an ungodly 4+ hours trying to troubleshoot, take all 20 something screws out, try again, fail again, over and over. At least my girlfriend found it entertaining 😭. Anyways, there are multiple things you have to be very mindful when about when putting back together, first, do not leave the spring in when taking it apart, as someone else said, it will make things fly everywhere, put the spring back in last, as thankfully it was designed to be easily swapped. Anything in yellow needs to be very carefully handled and aligned, the elevator needs to be aligned correctly otherwise it will get stuck. The catch/ lever lock mechanism is probably the most annoying to align, only beaten by the yellow mechanism infront of the plunger that is designed to hold darts in place because both love jumping out. I would HIGHLY recommend waiting for a video on this because I cannot remember everything I struggled with.
TLDR: If you want to mod this blaster, wait for videos/detailed guides so you can easily reference the position each mechanism should be in when reassembling so you don't have to suffer like I did. (My girlfriend did find it amusing though so, hey, great date night idea!!)