Hi Ian
Keeps the T-34 post coming. Just a few comments presented only to provide info on some alternatives for those wanting to follow in your footstep and up the ole T-34. Again just my 2 cents nothing more....
Volume Pot:
Changing the volume pot to a 'better quality' one will not do anything for the sound and only decrease your bank balance unfortunately. Pots and audio are a subject all to themselves. The most important factor with pots for audio is not so much 'quality' but the rate at which the resistance changes with the turning of the dial. So it is HOW the volume changes as you turn the dial rather than the 'quality' of the sound that deterimines a 'good' pot for audio. As such 'good' audio pots are needed in situations like studios where you need precise control over volume - not so much in situations where the volume is pretty much set and forget.
Still the sound can only be as good as the weakest link in the chain and that is the RX18.
I created the Pothead/Viper specifically for situations like yours. Where moving the volume control from underneath the tank was important. Especially if you want to run through the odd puddle of water.
Remove the old pot fill in the hole so water can't get in and plug in a PotHead/Viper - job's right and done in a minute or two. With the added bonus of never having to bend down to adjust the volume of your tank.
Battery:
Your battery situation - another option for anyone else following in your footsteps would be to investigate use of a 3 cell LiFe battery. LiFe batteries are a form of LiPo that outputs 3.2/3.3 volts per cell and hence provide very close to the 9.6 volts of the AA battery pack. In the long run the LiFe will be more economical. The same LiFe battry that could be used in this situation can also be used to power the Turnigy 9X. This is the battery I use and it is available in the HK UK warehouse:
http://www.hobbyking.com/hobbyking/stor ... _Pack.htmlAs for the charging - that is exactly how I wire my tanks as well. (but if you were to use the LiFe battery you would need some extra bits)
Now as from an earlier post - I am concerned that you are sending 9+ volts into the RX18 and thus onto the MAKO. This will not be an issue for next gen MAKOs but will be an issue for the MAKO you have. I would get the tank all up and hold off on plugging in the MAKO for the time being. Also I would not connect the usual Heng Long IR electrics to the battle port either as you will be sending 9+v to the IR emitter.
Phil (my video producer) & I have scored the iPad for today so expect a video of the next gen MAKO very soon.
Cheers
KG