Hey! Got to try the Glide 620 and its partner H145. - extremely good foil. anyways. There is alot of flex in the H tail, and I am curious about why, is there an advantage by having it flexy?
I'm loving the 620 with the s165 tail winging at 87kgmuch prefer it for winging over the h145 & s145. Not tried the h165 yet though. think for me being a heavier winger it needs more tail. the h tail better for prone and pumping I think 
www.instagram.com/reel/DAtoYGCoXAv/?igsh=dzE1andlcGdmYmYy
Got the H165 and flexed it ashore and see what you mean, then went and bent a friend's P200 and that bent as well.
