Version 1 (can use shorter rear dampers): upgradeparts-tam-mantaray-reartower-standard
Version 2 (can use long rear dampers): upgradeparts-tam-mantaray-rear-tower-standard-longerdampers
Version 3 (long rear dampers, with spoiler mount): upgradeparts-tam-mantaray-rear-tower-standard-longerdampers-withspoilermount
Depending on the step screws you use, enlarge the holes as you see fit.