Hi everyone, A bit about me: I mostly play at the club level at my university, which means I basically only play doubles. I play a few tournaments a year and usually place in B/C level. (Not sure if this makes sense) I usually play with an AX77 or Thruster K Onigiri (both 4U). I used to have a AT900P 4U and it's still my favorite. Just generally, I like 4U head heavy. Not really sure what my preference on stiffness is. I like to play in the back more and really want to have good maneuverability with the racket, partly because I'm working on recovering from a shoulder injury. I'm looking now for a backup racket for the Astrox in case something happens. Some of the rackets I'm considering based on specs: 1) Another AX77 (4U) 2) Duora 10 LT (4U) 3) ZFII (4U) 4) VT70 Etune (4U) I'm ok with buying another AX77 but if there's another racket I could branch out to and use, I'd like to try it! Does anyone have any thoughts on these rackets for me and how they compare to AX77 and AT900P? Thanks!