The dyna flex isn't a great sole as the stitching splits around the midsole.
RM Williams Boots - Everything You Wanted to Know - Page 260
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+1 on this.
I have tried pretty much every sole option on the Craftsmen boots & have almost always come back to the composite rubber sole for casual wear & the leather option for the office. The leather will wear quicker than the dynamic flex will, but I did have separation at the toes on the DF option which is enough for me to stay away.
In the DF sole, they insert a very thin layer of material for the 'comfort' factor between the lower and upper sole materials & this is bonded with glues. Over time with the movement of the foot, it seems that the glue losses its bond & gives the appearance of 'separating'. I say appearance as keep in mind that the entire construction is stitched right through, so there's no actual chance of it coming apart.
This occurred on one pair of DF & didn't on my other which were both bought at the same time.
So, I guess it comes down to whether you prefer the look of the DF sole over the others & are OK with the slim chance that this will happen.
Did RMW indicate that you should take them there ?
Tru bootonline and they may get you a custom order. I`m a 9 1/2 F too - great fit, the G`s will be too wide and stubby
I wonder if they have the lasts, which would be the main reason to go to RMW for repair.