Thanks, I've looked up old posts and seen the SJ4000 and the other website mentioned. Not sure if the SJ cam would be compatible with windows phones whereas the Gopro has an app, good bit cheaper though.
I wasn't sure about the pole diameter so that's why I was looking at Polarbrite.
Below is carbon tubes standard sizes, I would assume CFTMO50 would be close but I didn't want to risk it.
Product Code I.D. (mm) O.D. (mm) Wall (mm) Length (m)
CFTMOD42 40.0 42.0 1.0. 1.25
CFTMOD50 48.0. 50.0. 1.0. 2.0