I like the crane aspect of the Wilesco. but the way they incorporate it relies on the steering to always be straight, I think it needs to be mounted to the chassis.
I believe the hand wheel gives up/down and the steering gives left/right operation of the crane...they may have built real cranes like this but I am no crane expert.
The (2) support chains are mounted to the Chassis while the base of the crane is mounted to the front wheel axle, an inexpensive but not well thought out design.
Also never been a fan of the Mamod TE. I find the drive band going around the actual drive wheel & unrealistic scale speed to be off putting IMHO.