Heng Long's Modern Tank Choice? (+ WW2)

[Meter rat]

If I get an opportunity I’ll do a video for you on my T72, about the bearings. Might be today.

[brucektrain]

All the models you have considered will be fine on the terrain you have mentioned. Just retain the plastic tracks, and upgrade the sprockets and idler to metal, and fit drive shaft support bearing. It is only when you start adding the heavier metal tracks the problems start. T72/T90 metal tracks look good, because the Russians don’t worry to much about ripping up the road surfaces, so don’t bother with the rubber pads. T72/T90 will be quite happy with about 6mm of slack at the bottom when there is no weight on the tank. The cracks in the hull were after 6 years of hard abuse on the T72.
Rc Tank Liegion, Forgebear, Motion RC, and Haya all carry support bearings. But they can be expensive. I get mine from Amazon, so I don’t have a link. From memory they are 8mm x 12mm x 3mm.
These were built as plastic toys, to be run buy kids inside so the hulls were never designed for the upgrades we do. It seems you are a little overwhelmed? But we are all here to help, and give support. Once you have done one modern tank, and got it running as you like, the rest are easy, as they all require the same modifications. It’s all been done in the past.

Would these bearings will be good?

[Meter rat]

Yes, all should be good with them.

[brucektrain]

Yes, all should be good with them.

So it's some kind of requirement if plan to run metal tracks on modern tank design from heng long? the metal part that goes inside of the hull with driveshaft and bearing to keep it straight up. so make it's more reliability?

[Meter rat]

Baby steps. You have worded it yourself, exactly what they do, and how they work.

I have deliberately pushed my tanks to the limit, to find what breaks. You could say tested to destruction, then a solution has been worked on. I did it one modification at a time, over a period of time. So don’t focus or worry too much much. By reading the threads on the tank you want, you will glean a lot of information about repair, and maintenance of them.