If you dont want to tie your own Hammerhead makes some tie in bands that arent bad. You can even get a hold of Riffe bands that size. I almost forgot but you can get RA bands that size too. They are some of the best. You can call Austin's dive shop. They can help you out.
I have the pursuit and love it, much faster load time than my 2 16's were. It is a workout though, make sure you don't cut it too short. Right now at the beginning of the day I load on the back tab but by the end of the day Im on the front tab haha
x2, I use 20mm bands on my rabitech 120. Different rubber manufactures have different rubber and some stretch a bit differently. I usually cut mine a bit longer and then cut them back as needed.
27" band 4" wishbone, center of band hole to back tab is 44"
is that an 18mm band? That is the length I use for 5/8 bands. Also, a 4" wishbone is too long and can cause problems with line wrapping in bands when shot. Cut it down to at least 3" and you can even go shorter. Thanks for the help