\ello
I am a new member. I’ve been doing mostly ashtanga and iyengar yoga for about 3 years. I am always looking for ways to improve. I thought this forum may help 
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Friendly greetings!
Hi,
Welcome, hope you find what you are looking for here, but you have to ask, that’s the only way. 
Namaste,
thanks!
I think I’ve made visible (to me) me progress in many things over the years,
except more flexibility for back bends. if there are any secrets besides slow gentle regular practise, I’d be glad to hear them
Hi,
You have the secret already. Patience is now the key and then acceptance of your limitations. I am excellent at back benders again, but find front benders bit more challenging. But I think if you are persistent and you stick to your practice you will see results. Thats the thing with yoga, it takes like all good things in life, time to come together.