I might be getting a Shiv Disc soon. I am interested in getting the extended bottle cage holder (behind-saddle) used by Lucy Charles on her Shiv Disc. I read somewhere that it is the Trimax Rear Hydration System by Vision. However, what is shown on the link below looks much longer than on Vision's website.

https://www.slowtwitch.com/..._Shiv_Disc_7053.html

I understand that the area above the sail of this bike is very tight. I would like to be able to hold two bottles behind the saddle, while also not blocking the opening of the sail.

Are there other solutions for this?

Atip