The lack of flexibility in a dry suit can sometimes also be addressed.... Unless the suit is genuinely too small, after doing the above you should have enough range of motion in the suit to reach the valves.
Adjusting the harness slightly or adjusting the tank position in the plate or the tank position in the bands can also move the tanks an inch or so in the right direction to allow better access to the valves. (Just be aware of the potential impact on your trim.)
Good feedback. The suit is not too small but what I did find was the harness was a bit tight. The kit we used belonged to the instructor and probably lack of experience on my part in using the harness added to the prob. It was explained to me to be able to fit my open hands under the chest straps for optimal fit. I found that doing the stretch of either arm while at the 5 metre S drill did help.
Inverted has fallen out of favor for many reasons (including smashing the regs when you set it down, the hose routing etc).
Yep, this was what I was thinking although the pic I made mention of had a plate under the valves for protection
you just need a slob winder.
I am a slob, thus whay I cannot stretch

Might try a skill from your open water class, reach down with the non-valve turning hand grab the bottom of those tanks and nudge them up within reach. Also adopt a slightly head down orentation.
Yep, even tried this one. The instructor suggested placing my head on the sand as I could then not go any further and the tanks would slide down. Not much good in a mid water situation though.
Glad someone mentioned horizontal trim, because the PADI DSAT video has the divers on their knees while doing valve shutoffs.
Not only does this make manipulating the valves more difficult, but it's not useful for real world situations.
This is one thing our instructor flogged me over, horizontal trim.. Bottom line is you are all correct and thanks for the feedback. Work on the flexibility is number one if I am going to continue with the Tec training, cannot let old age get the better of me. I will be retiring my BC and going with my own BP/W so this gives me no excuse for not haing a correctly adjusted rig.
Again, thanks for the tips
Cheers
Rainsey