Hah! Brilliant! 
these are tempting: E-Power 12 gram Metal Geared Micro Servo £4.60 giantshark.co.uk/epower-meta … 03797.html
bit less torque than the SG92R, but seam to be rather well liked…
makes 103 euro for 18…
sold also as Emax 12g ES08MA $7.95
headsuprc.com/servlet/the-16 … MAX/Detail
From the construction point of view. I am really interested in metal gears for the aligment to the “horn” (I think that’s what you call it). Hard as I tried some of the horn to servo connections the shafts screws did not go 100% perfect. Damn plastic is a wee bit cockeyed which translates to a off kilter stance when it’s at the hip (leg to body) servo joint. I hope and assume a threaded shaft/gear would help aliment in this case.<?>
Even though I just ordred some more gears and servo’s I might get a few more to see if it solves the aliment problem.
I am taking my Hexy to open shop night tomorrow (a local maker space) to let others comamnd it. I know it will come home with more stripped gears. As in an excuase to buy more upgrade parts that is. 
The TGY-9025’s have arrived and are a perfect fit! I have posted the pics in my build thread. Check it out, very happy!