... look at my comment and the photos in your builderblog at reprap - https://www.blogger.com/comment.g?blogI ... 1592482661
With a fiber-/needle-pad or better wit an active fixing-pad (as described in my comment) per leg your bots could crawl on steep surfaces or even upside down, when they aren't to heavy
If you want, i can send you some pieces of the fixing-strip - i bought them 10 years ago in my local tool-store, but it seems they aren't in the market any more ...
Viktor
