I'm building this Tiger

[SteelBird]

Put a small washer between the offending idler wheel and hull to space out the idler.
Fixed mine straight away.

I've done what you said and will take it for another try today to see if anything changes.

[Tiggr]

Hi Steelbird

Jake, I've been thinking of getting a Taigen long time ago but they aren't available here. If I bought one from Europe, the shipping cost would be insanely high.

That's a shame. Taigen (&Torro) metal chassis are rugged and reliable. If you upgrade to metal gearbox as well as metal tracks and drive sprockets you will also find the 1700 mah battery really struggles when you want to turn the tank when manoeuvring out on the battlefield. I found this with my HL "Pro" version Königstiger - it would turn on a hard kitchen floor but as soon as I drove on carpet there simply wasn't enough power. Straight line was okay though.
I doubt the plastic gearboxes would last long with multiple metal upgrades.

[SteelBird]

If Taigen is available to me, I would buy a whole tank, no need to mix Taigen base and H/L upper. Unfortunately it is not the case!

Here is an all out attack of my tank fleet on the first day of Lunar New Year. After adding a washer, the Tiger 1 perform better but it eventually throw the right track. The Leo2 moved like a turtle, I don't know why. The only part upgraded for this tank is the metal drive sprockets + the track guides that keep the tracks inline, no more throwing tracks on the Leo2. The Panzer III performs best amount the three though there is one thrown track when I attempted to attack a slope sideway.

From left to right, full metal, half metal, full plastic


Tiger managed to get to the top of the mountain


Panzer III attempts to go up the mountain. Note that all stress on the rear wheel. The suspension of this Panzer is very soft


Leo2 almost fell off to the side when attempted to reverse down the hill.