Yes we lower it slow, also when raising it we do the same. When we reach out height then I measure the distance to make sure the height of the center round pipe is the same.
Metal: 3x3 3/16 for the frame, then 2 1/2 x 2 1/2 for the legs. I made it adjustable and also it will collaspe for easier storage. Then on the middle leg used 2 x 2 11 gauge to connect the two rotisserie together. The caster are 9 inch for me to be able to roll outside in the yard to do the blasting. The mount points are 3x3 3/16 so the 2 1/2 x 2 1/2 will fit inside and is adjustable and is locked off using jam bolts. The hydraulics are harbor freight 3 ton units, also the casters. I had to purchase 20 foot sticks of 3x3, 2 1/2, and 2 inch. Then I needed more 2 1/2 then purchased from Metal Supermarket. I can post more pic's if you need me too. Like I said I looked at all the other rotisserie's and took idea's from all of them.