Some DB-01 Random questions

[Ignition]

Hey dude's !
I'm just rolled into the Offroad Scene and I must say, this is a great site/forum to search for info !

I got my DB-01 in the summer vacation and kinda rebuilding it right now, Santa ordered a 5,5T EzRun Brushless motor for me, and I got it for like 2 days ago.

After I got it, i went on some researching how the gearing should be and how fast it would go, but I saw a few topics of diffburning problems so I have some questions about it.

Yesterday i took the diff out of my Durga, cleaned it up, took the diff balls out and locked it, because a slipping diff is causing heat.

Saw in some topics I had to buy a TRF501X diff, but what do you guys mean ?
The diffjoints, or the diff itself ?

After some searching i found Heavy Duty (Aloy) Diffjoints from 3Racing, are these any better than the TRF501X diffjoints ?

What kind of things do I need to order with the diffjoints (and diff offcourse) to make my Durga even more 'bashproof' ?
(i know, it can't be 100% bashproof, but you guys know what i mean )

I allready got:
-Yeahracing Oilshocks
-Tamiya Slipperclutch
-Tamiya Universal Shafts (front only)
-Tamiya Carbon Reinforced Shocktowers
-DIY Locked reardiff
-Some spare pinions, spur gears, belts and reartires

And a friend of me is looking for some titanium/ceramic diffballs in his room


I saw that the EZrun engines are getting verry hot, so I want a new body, and cut some airvents in it, should a TRF501X body fit a DB-01 too ?

Thanks !