no experience with extreme pod but atlas also has leg extension now. cheaper since you already own atlas.
https://www.coreshooting.com/products/bipod-leg-extenders?variant=5957368067
Are you referring to something like this
https://www.amazon.com/gp/aw/d/B01B6S8IOY/ref=mp_s_a_1_fkmr1_1?ie=UTF8&qid=1502173944&sr=8-1-fkmr1&pi=AC_SX236_SY340_FMwebp_QL65&keywords=caldwell+sling+swivel+bipod
