Unless the lipos to be ran in parallel are lower spec items (in terms of mah or C rating), then a single high spec lipo is fine (or a pair in series to get the desired voltage).
I favour the parallel setup for extended runtimes, using a a pair of good spec lipos or A123 packs; weight is not a concideration for me, only nuttiness.
With a motor on one side of the truck, a single larger lipo on the other makes sense, but balancing the weight is more important/tricky perhaps...
Technically you dont need anything to convert it to single. Just remove the second servo. You can trim back the steering arm if you like. You should also purchase a high torque servo though - something over 300 oz-in.
Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES
Yeah, its a piece of cake to use a single servo on the 3905- just remove the second servo and long connecting push rod- that will leave you with something akin to the UE or Proline steering setup. You can also use 3906 spec parts from NewEra or GPM etc.
Cool! I will look into this later this afternoon when I get home. I got two spare Hitec HS-645MG which is 130oz each combining for 260oz, which I think may not be enough. I also have two spare Hitec HS-5995TG with 330oz each for a combined total of 660oz which I think may be an overkill! Im left with a delimma, so I figure the best is to use a single HS-5995TG.
Ok, finally got some time to put some work into my new EMaxx. Just waiting for the pinion and its ready!
PICS!
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S
Hmmm... its weird I did post a pic but guess didnt do it right or something. But you can see the pic of my EMaxx (Work in Progress) on page 3 of the link below.