i have hade a diecast 1/24 hopper with t-sliders for 4 years the thing my opinion is way better than the u bars i dance it and hop it till it flips over it's been running good for 4 years[/b][/quote]
I have had no problems whatsoever with U-bars it performs great and besides that it looks a lot better than T-sliders.
A good combo would be T-slider in the back U-bar up front.
It's all about adding a bit of weight in the back and with a diecast there should be no problem whatsoever.