okay, here's the scoop on the tiny servos:
the hs 50 weighs in in at the lightest and
draws the least current.it sappears that some manufacturers post the servos's weigh w/o the control leads (which i find to be very misleading). i read on the GWS site that the GWS Pico servo comes with one BB but upon inpection found out that it does NOT. and the Cirrus CS-10BB is the same exact GWS servo, but it does contaim a BB on the output instead of a nylon bushing. the CS-10BB seems to have the least play or slop of all of them, but i never had a problem with HS-50's and since it draws about half the current of the other two, i chose to use them in the housefly.
here's the weights w/o a servo horn or mounting screw, but with the control wire as it comes right out of the box. the HS-50 does have the shortest control wire, but it's a larger gauge than the other two.
HS-50= 5.85 grams
GWS Pico servo= 6.00 grams
Cirrus CS-10BB= 6.3 grams
BTW,when you cut off the mounting ears, the GWS pico and the HS-50 will weigh the same (the GWS's ears are thicker)