i see lots of good quality photos of tanks , im requesting a little information , im currently changing the rather budget quality heng long rc to a spektrum dx6i set up , the spped control is now through a pair of mtroniks viper 15s and a mtroniks tank mixer which works very well ( no more heng long dance ! ! ) however as weve removed the rx18 unit ive now lost the ability to rotate the turret and lift / lower the barrel , im also now missing the sounds ! has anybody else converted the turret / barrel , & how have you done it please ? jon / kev