I hope this is the right place to post this question.
I need some advice on gearboxes for a KV2.

I have a taigen hull with metal wheels, cogs and idlers. (no tracks yet)
I think that I need short shafts for the cogs.
Can anyone suggest what gearboxes I can use.
I would prefer to use a low ratio if possible, 4:1 or 5:1

Also, I have tried to fit heng long High/Low gearboxes from a Tiger 1 but these hit the upper deck.

Any help would be much appreciated.

Thanks
Afrikakorps