ok so the way the otk works is by having any of the low level chronomaly monsters in your hand mini guts and two chronomaly moai as well.
1. summon the low level chronomaly from you hand (but make sure they have a monster w 1900 atk at the least the more the better though)
2. special summon both of the moai from your hand. overlay for machu mech
3. activate mini guts tribute the low level chronomaly. target their monster.
4. activate machu mech effect they take 1900 or more depending on monster.
5. atk with machu mech for 4300 or more.
6. mini guts 2 effect kicks in as soon as the monster is destroyed by battle that turn and dealing damage equal to monsters original atk for the win.
so in the end 1900+4300+1900=8100
works better than the gagaga otk in my opinion. sideboard is standard.