Looks good Dr H.
Those tyres look sweet PJ.
And heres the vid of me hacking around with the BIG TYRES on the MT2. And no Im not drunk near the end, the left front lower arm broke and it sort of wasnt tracking so good...[X(].
http://www.rcpics.net/img/68332
Oh yea, I have the e-ring hinge pins too and one hole in the new towers need a slight reaming.
And PJ Id say the hinge pins dont make any real difference, a tiny bit less play and they dont come loose at all, but I would say the arms are slightly easier to break with them on as the stock pins provide a little surface area on the plastic where the head of the nut is. My broken arm just pulled rifgt through the pin hole at the front, must have taken a hard hit on the wheel.