TM does not sell this O-ring since it is not necessary actually (just make more easy to assemble the gears into the diff. housing) and it doesn't affect the performance.
All pricing has been adjusted already since we posted out, very low price and you cannot find one better than us in the entire world, also we carry 100% of latest G4 and E4 parts and options.
but the K-element Servo Mount is much high price.....the hole set 4mm Rear Shock Tower Mount is nearly the same price..but with Alum.&carbon parts....T_T...any bargin with TM /.\
You have to understand how factory cut the parts out. If the shape is very speical, that it means more work and more CNC waste. You should not compare an apple to an orange.
Why CNC stuff are expensive, becuase factory cut the parts from a solid alloy metal. Plastic parts are cheap becuase of from molding. Compare to other brands (eg. one xray CVD cost $300, an engine mount cost $500), prices of TM stuff are very low and resonable...... since we are here, the pricing is more reasonable than before.