There is an internal safety, so thast the tower cannot be raised past the upper limit. The rotator mounts on the top plate, which is pre-drilled for both popular bolt patterns. The towers are available in a variety of sizes to fit most every need. Towers need to be either bracketed to house or vehicle, or tripod supported. Various bases are available.
Ratchet winch is standard and worm-drive is optional.
The worm drive can be run with a cordless drill. 60 mph windload at 10' above ground. Wind velocity is higher at the extended height and is taken into account. Tower is set up temporarily using an X-base and guyed at the first section. The 40 mtr dipole is only 5' below the 15 mtr Yagi and does not disturb the Yagi.