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Originally Posted by Sammus

1)So now for the actual question what are the longest batteries you can fit in Mike's chassis using the battery bar etc it comes with? I think mine is about 150mm long (don't have it handy to measure).

Ans: I meassured my RCM Ext chassis and 150mm looks good with the stock hold down, but you will need to make your own strap. I cut one from some left over CF, but even a Losi XXX-T strap with an extra hole drilled would work.

2) What will require more grunt out of my extended CRT.5 and my rustler? I'm thinking of either buying a velineon or sidewinder 4600 combo - so even though I could figure this out myself when the time comes, which would be better suited to what do you think? (out of veli3500/sidewinder4600 and MM+9L).

Ans: I'd guess the CRT.5 will require more grunt with the 4wd system and a bit more weight than a Rusty. However, I'm sure the crt.5 can take more power. With its 3 diff and 4wd setup you can run a lot of power through it without wheeling over. Some users have had heat issues with the MM/4600. The MM/8or9L seems to be a safer bet.

and 3), I've heard of a lot of people using 1/10 2.2 rims on their CRT.5's - mainly nitro rustler rears though. Does this mean my millions of e-rustler rears can be used on my CRT too? or will the offset on the e-version be too narrow?

Ans: For bashing or rough loose tracks the 2.2 truck wheels are the way to go. But for tracks with larger technical jumps then the smaller stock wheels work better. On bigger jumps that require throttle and brake in the air to land correctly the 2.2 truck tires are difficult to control. I also break more parts when running the 2.2 truck tires. More weight and leverage.

edit: oh and while I'm pickin all your brains, whats so good about that kyosho spur that everyone loves using?

Ans: If you are willing to go through the hassle of making the kyosho spur work it is quieter than the mod1 and does not require hardened steel pinions. However, I've been using hardened steel pinions (available on RCM) for months and they show very little wear. At only $10 - $12 each, it doesn't seem worth it to go through the kyosho hassle.
Cheers

Sam

edit2: just realised I can get the motor mount on its own... Anyone got any ideas how big of a battery will fit on it if I fashion up my own tray? Cheers

Ans: The stock chassis is 40mm smaller, but not all of that space is lost because the RCM battery mount posts take up some space on the Ext chassis.

Here's the bottom line for me and a few others I've seen. In the CRT.5 lighter is better unless all you want to do is make videos of your car flipping over backwards or making speed runs on the street. If you want a car that will run with a 10th scale wheeler (very capable cars) then you need to keep it light and keep all the parts on the chassis. Long batts require you to mount items above the chassis and throw off the balance. Mike's intention of using 100mm long maxamps packs works very well for balance and handling. Plus the Maxamps packs in that size are their only 20C pack. Very powerfull for the weight.