Funny how they indicate the stall torque of the servo as 'kg/cm.'
I suppose they mean 'kg cm.'
Next time you purchase a servo(s), find a local RC / hobby shop and support them just a bit. Additionally, if you strip the gears somehow with your experiments, it's super simple to purchase replacement gears and rebuild the servos. HiTec servos are reliable, sturdy, everyone has them and is familiar with them, and everyone has parts for them.
Similar for Spektrum servos. Stick with known names so you can rebuild those suckers.... experimenting and over-stressing (crashing) nearly always requires modification and/or rebuilding.
Plus with HiTec you have the option of replacing their cheaper nylon servo gears with steel or even titanium gear sets.
I hate throwing my money at china, but if I have to I try to help out the local establishments as well. Plus there is a real, live person behind the counter just hoping and waiting for someone to ask him/her for suggestions to help solve fun problems!
My local hobby shop is a good half hour away from me, but I find myself walking in their front door at least a couple times a month. Lot's of information in that place.
Dave, check your PM's