U can get aluminium 25t servo horn at joyrisinghobby.

Ah great. I will place the order now. Before I can change my mind! thanks for the help! 

You will need a BEC as well. Castle ESCs have BECs incapable of supplying Savox servos. The 1256 should work well. An aluminium servo horn is always a good investment.

You'll need a Mod 1 pinion for the ERBE. It shouldn't be too hard to find around here.

The castle esc outputs at 6v. This is not optimum but it should still work. I'll get a bec later.  I ordered some 5mm pinions as well

It cannot hold the 6V output when the Savox servo draws current. Savox servos are known to draw excessive amount of power and Castle BECs are notorious for their low current rating.

The savox servo also has a 4.8 v draw. That's less than 2 stock servos. Are you saying it won't work at all or it won't perform optimally without the bec. The only place I can get a castle bec is from tower and that's going to take time to deliver.

It might work although the likelihood is low. Some have no problems running MMMs with Savox servos but many people have had problems with a combination of Savox and MMP.

The Rx does play a role here too but the main culprit is the internal BEC on the MMM.

An external BEC would be highly advised. If you haven't bought the BEC yet, just wait for the servo. Plug it in, see if it works well. If it does, continue. If it browns out, try a glitchbuster capacitor. At times, even that won't solve your problem. In that case, a BEC will certainly solve all problems.

A 'glitchbuster' capacitor is basically a capacitor that plugs into your Rx's spare channel and smooths out the voltage ripples caused in the power supply to the Rx. If you want more info on this, check this out.(This will be interesting if you're 'into' electronics. If not, the link will bore you. )

A brown out is when the servo draws so much current that the Rx doesn't get enough current to keep running and restarts. Spektrum Rxes are most prone to brown outs as they have a higher operating voltage.

A brown out looks like this.( This is with a Mamba Max Pro, which has pretty much the same BEC as the MMM)

4.8V servos are very rare these days as most of them are ran at 5.75V or 6V.(There are HV servos which go up to 8.4V which are gaining popularity). At a lower voltage, the performance will be dismal.

Cool, I'll try it out and post the results. If it doesn't work, well then I'll use a single 2075 and go back and forth in a straight line till I get a bec

Haha. If you don't mind soldering and a small visit to an LHS, you can make one on your own. If you do, just make sure you solder it with the right polarity and plug it in the right way.

I don't know how to do any soldering

Is there any way I can get a BEC or this glitchbuster locally? Would also be looking for some 25t servo horns. I tried to order it from joyrisinghobby but it just gives me an option to mail them. Still haven't got any response

Never mind. Just ordered a whole bunch of stuff from tower (including a BEC, will need help from you regarding soldering once it reaches)

No problems. You might need a new Traxxas connector(female).
Just to give you an idea of what you'll be doing, check this out.

I'm going to use the glitch buster initially and do the bec upgrade later. Another guy on the trqxxas forums said he's been running the 1256 on the revo without any add-ons so the bec might be kept as an emergency only

If you're lucky, you won't need a glitch buster. A glitch buster should solve most problems(if any).

The BEC will be a last resort.

got the new savox servo. works great but it's very noisy. had to spend some time meshing the gears so didn't get a chance to test the new servo outdoors. will check it out tomorrow. this might become my official e revo thread