HPI had their new 4WD Mini on display today at one of our races. The steering linkage doesn't seem like a problem especially if you mount the servo in the upright position rather than the laydown position in the photos. The controls on a helicopter are like this and the loads and the precision are greater than those in our applications. It looks like a quality kit
and the 240Z body is one I have to have. To mount it upright, the servo, that is, you do need to use a shorter servo.

What might not be noticed in the photos is that the wheels are larger. Bigger than our Mini wheels, but didn't seem to be as large as TC wheels. They may require special sized tires. The tires they did have seemed to be the same diameter as the Tamiya 60Ds, but were what could be described as low profile. My apologies for not measuring, but I was distracted by the racing.