[@Kobayashi] Hey! First let me welcome you to the Guild. Now that we are done with the pleasantries, let me say that (just like I stated above) I'm not the GM, but I can answer your questions since they were already asked/addressed before. Hopefully, it'll help you. - We are allowed to modify the Mechs, but they should meet the specifications of the two available models (the M-13 "Diamond" and M-09 "Axe") and, with a very good reason, the Mk X "Sparrow". You can do pretty much anything to them, as long as the overall performance doesn't go into, or beyond, that of the Mk 0 "Garm", which we are not allowed to have at the beginning, just like we can't use 5th gen fighters yet. - What you described is par for the course to any CAU, but if you want to go to the extreme, I suggest a modified Diamond, since someone else already seems interested on the Sparrow and they are supposed to be very rare, or try to convince [@Shin] to let you have a Sparrow as well. - Be aware that, no matter how good you try to make your CAU, it shouldn't meet a Garm in terms of overall performance, or be able to move at top-speeds than 1,000 km/h, which still put your machine way bellow a fighter plane in term of speed, since all of them are able to break the sound barrier casually. The advantage they have over fighters is being able to do very tight/sharp maneuvers at speeds (~ 600 km/h) that most airplanes cannot, so only a pilot with very high skill, or a very good machine (super maneuverability fighters like the Flanker E and F, F 15 MTD, Eurofighter, etc...) can hope to outmaneuver a CAU. I hope these have helped you.