Vex In The Zone Robot Ideas

I am thinking of ideas for a robot. I was wondering what are some good building ideas. Also what is better a double reverse bar or a chain bar?

There are many threads on this subject. Please do a google search before you ask the same questions.

https://vexforum.com/t/in-the-zone-design-ideas/42761/1
https://vexforum.com/t/in-the-zone-lift-ideas/41263/1
https://vexforum.com/t/into-the-zone-intake-designs/41065/1
https://vexforum.com/t/rd4b-not-the-best-option/42888/1
https://vexforum.com/t/mobile-goal-carrier/42877/1
https://vexforum.com/t/how-to-make-a-scissor-lift/42473/1

(Edited to add more links)

Our team is using a double reverse 4 bar is seems to be faster and more efficient but it really depends on your teams preference.