You are welcome. Btw, if you have looked at the methods available on 3ds.guide (that's a website too in case you aren't aware and usually updates the entrypoints and methods faster than that wiki page I linked) you may have seen that hardmodding is also an option and can get you instant cfw without the need for a second 3ds, but highly recommend against unless you are good with soldering or have someone who knows their stuff do it for you. One things about that wiki page, you need a "primary exploit", for the secondary ones, you NEED to have access to a primary one and generally just offer more stability (not as important as you'd think if you just want save editing)!
I know about the one shots, end-game armor maxed out with Lagiacrus GS (one of the best weps in the game thanks to both high raw and having decently good Thunder to which most things are weak against) and with a monster with 600+ in all stats and even the regular stuff in the tower literally obliterate you, let alone dual high rank Jhos after they start spamming Gluttony! Without save editing you will end up with PTSD if you try to go for 100% completion
It's not a bug, it's just Capcom being Capcom making it a pain to play the post game just to justify the 50€ price tag...