Heavy Duty Rear Springs

[PaulNZ]

Ok, I have a pay load of 30 KG, yes its high but the truck can take it and lets face it, its a working truck.

My problem starts when I first pressed down on the trailer springs to see how much travel they had and they are about half way compressed and with no shocks, happy with this in fact, near perfect, then I pressed down on the rear suspension of the truck and they had bottomed out, so Tamiya springs are good for trailer but no good for trucks.

now here is my question, what is the best aftermarket rear spring set up for a Tamiya Rear?

must be HD, If it was a real truck I would be looking at a TuffTrac set up like the one below

I'm sure I've seen something like this at RC4WD but what are they like?

I suppose my original plan of having a Tri-drive would fix my problem but I kind of like my set up now.