Questions..new to carpet (usa track)

[j.d.roost]

Hello...Not to many permanent indoor carpet tracks here in the us.
I am fortunate enough to have one 5 minutes from my house.

Looking for some car advice.
I currently am running a rear motor b4.2.
After seeing just how much better the mid motor Losi was on our high grip carpet (got to burn a pack with a buds car)..I was instantly sold on mid motor.Started looking into the conversions for my car and the only viable option in the states is the new x-factory cube coming in a few weeks.
This will add up to close to a $600.00 2wd buggy by the time I get it sorted...and it will have some one off parts that I can't buy "everywhere".

To try and shorten my long winded post...
I decided a factory kit mid motor car is the way to go. I am looking at either the rb6 or a dex210. From what I can see the dex looks to be a winning platform on carpet/astro. (Just going on posted race results on pages like euro offroad series ect.). What I don't know is what needs to get dumped into the car parts wise to have a successful carpet car. Are there parts that are hard to get and/or expensive (see most of the guys are running a +8mm aluminum chassis...but it's $150.00 dollars here ) I also have read that parts are sometimes hard to get. I also don't want to buy into a car if it's getting a bit long in the tooth.

Other option is the rb6..I would assume because the car is newer I don't see the same results for this chassis yet? Again...it's a pricey kit but if it's dialed with no needed upgrades it will equal out.

Sorry my 1st post is sort of a "is this better than that" deal...There is just not alot of carpet offroad information over here.

This is my track..Only video I could find was the 4x4 guys (sorry).
https://www.youtube.com/watch?v=wQpgf9ddIWg