pic: BTW-1209 hurdling robot
 

Re: pic: BTW-1209 hurdling robot
 

two questions, is that an entirely pvc frame? and what makes the lift go up?

Re: pic: BTW-1209 hurdling robot
 

I'm going to guess 8020. PVC as second guess (though why PVC in a drivetrain application, I don't know).

Re: pic: BTW-1209 hurdling robot
 

looks like 8020. i see the special connectors and accessories

Re: pic: BTW-1209 hurdling robot
 

we are using 2020 (8020 is the brand name) as well and i believe i saw the video you had of your lift on you tube and it is essentially the same as ours but we are using two pillars of 2020 with a section in the center for our claw

yours looks like its WAY lighter than ours (we have about 7lb right now to finish making edits and then we will have to start swiss cheesing) but also looks a little structurally unsound...

Re: pic: BTW-1209 hurdling robot
 

You should probably set your lift so that there is more overlap between sections. This will increase the strength dramatically as well as reduce friction.