The aluminum suspension arm kit was around $70, but worth it! I did have a lot of work cutting the wheels for the flanged bearings and then setting the correct 'crush' when re-installing the wheels.
My second effort has the wheels 'sleeved' with brass (thanks to Lynn from our group) and I'll back-fill the arms with some J-B Weld and frame out the inside to 'stiffen' them some. But the biggest problem with the flex is where the arms attach to the chassis. The fit there is very bad and sloppy and has way too much side to side play.
Like I said, our battle are inside, so using the stock gears and drive it with care it should last a long time. What Daryl was eluding to I bet was installing the Pershing gearbox with a set of outdrives, then changing out the drive axles to the T-34's sprockets ... this would make the T-34 bulletproof and more than capable to run outside in the elements. That alone has the cost soaring and I agree it would be cheaper to get a used Tamiya off ebay.
But with the M4 electronics, you can toss the recoil out and keeping the stock elevation and turret rotation, adapting some of the WSN plugs in certain areas, stock gears and better motors, it's a real easy CHEAP runner. I ran mine all day instead of the M4 and got a real kick out of it how smooth it turned out. With the 3300 batteries, it ran all day ... 8 hours!
But like I said ... a lot of work, especially inside making room for the electronics and cutting the battery box out.
Jeff