I edited my post after you posted angain MacII.

Are you talking about a Monster Truck? In a buggy/truggy the is usualy only two body clips so you can lift one side of the body up withour removing it (your body might not last as long with the constant bending) then it is just a simple case of removing the battery and re-pluging it in. If you only use one velcro strap and use bannana plugs instead of deans i would have thought you could change the batteries very quickly. You could tape/glue the two bannana plugs together to make the changes even quicker.

If you really wanted and you were using ideally a hard case Lipo you could attach the two female plugs to the side of the Lipo and attache the male plugs to the battery tray so that all you have to do is lift the battery in and out.

I've been racing a E-CRT truggy. I'm about to get some kind of E-Revo, on the fence between the genuine article and the possibility of doing a conversion. My E-CRT has two packs now and the new E-Revo also uses two packs. Can't help but feel like I keep fighting a loosing battle. Either I run with huge and heavy high capacity packs to make 20 mins which diminish the agility of the vehicle or I change mid-race at a massive time penalty.

The new E-Revo might be possible to change packs semi quickly but only if you can get at the packs with the body on, and only if the wires are in the battery boxes. IMO taking the body off/feeding the wires through a hole the the battery box mid race is not possible.

What capacity are your packs, surely a good 5000mAh pack would last 20 minutes?

I've run two 4900 TrakPower's in my E-CRT. Now, I know I'm using a very inefficient motor (one of those mystery XLT-1's from FD) and I am upgrading this year to either true blue Neu motors or the Castle Flavor Neus but as it stands, at the tracks I race, I can get 12 minutes race pace, I've done 15 twice when I was babying it and way off my normal pace. I'm fairly resolved to try using 6000's and hoping for the best.

mac that motor has to go. i had one and when i got the NEU i took the FD and threw it in the trash. i would spend money on a neu before buying more batterys. my opinion

The efficiency of the Neu might add a few extra minutes. I might be wrong, but I get nice run times with my heavy truck running on grass. I know it's not racing. I used the 7XL a couple times in my MBX5T, but now it is much better with a small Mega ACn22/30/2 motor in it.

at the winter nats an electric buggy ran with the nitros in a 45 min main and they did a battery swap pit in under 30 seconds. most nitros pit 7-8 mins, some 9.... at 8 mins average. thats 6 X 7 seconds for a quick pit, so it's pretty close.... I am doing the same thing unless we have enough electrics for our own class

Thoughts.
 

I still think that one could configure a project that would allow some kind of slot design to change batteries without removing the body, and rig the plugs so that you may simply slide the used pack out and slide a fresh one into the tray with the plug lined up perfectly for quick change snap in configuration. Kind of like what was mentioned earlier with the Dwalt powertool batteries or even like some cell phone batteries do. This is a doable thing for sure.