I just signed up to the Traxxas forums but have lurked here in the past and have learned/obtained much info that helped in the creation of the project below, so thanks to all who share here.
I was highly considering getting a MERV and even bidded (unsuccessfully) for several used on ebay. I admit to being anti-RTR even though I understand they are good value for all you get, so please forgive me for that.
Instead, I bought a MERV chassis/center trans and created my own special vehical by adding a set of old PTI Goliath axles and other miscellaneous piece parts.
I guess it's a 1/2MERV. Please have a look